DB2数据库中的日常实用操作全集

      对于DB2数据库而言在日常应用管理中会使用很多的操作,下面就给大家介绍一些使用的操作,希望能对您在DB2数据库操作中有一些帮助。

  1、Load 方法装入数据:

  export to tempfile of del select * from TABLENAME where not 清理条件;

  load from tempfile of del modified by delprioritychar replace into TABLENAME nonrecoverable;

  说明:

  在不相关的数据表export数据时,可以采取并发的形式,以提高效率;

  TABLENAME指待清理table的名称;

  modified by delprioritychar防止数据库记录中存在换行符,导致数据无法装入的情况;

  replace into对现数据库中的内容进行替换,即将现行的数据记录清理,替换为数据文件内容;

  nonrecoverable无日志方式装入;

  2、查找当前的应用:DB2 list application |grep BTPDBS;

  3、删除当前正在使用的application:

  DB2 "force application (Id1,Id2,Id3)"

  Id1,Id2,Id3 是List显示的应用号;

  4、查看当前应用号的执行状态:

  DB2 get snapshot for application agentid 299 |grep Row

  5、查看数据库参数:

  DB2 get db cfg for //当前数据库可以省略

  6、修改数据库的Log数据:

  DB2 update db cfg using <参数名> <参数值>

  7、DB2Stop Force的用法:

  在进行Bind的时候出现如下错误:

  SQL0082CAn error has occurred which has terminated processing.

  SQL0092NNo package was created because of previous errors.

  SQL0091NBinding was ended with "3" errors and "0" warnings.

  主要是表文件被加锁,不能继续使用;

  在进行stop的时候报错:DB2stop

  8/03/2005 21:46:530 0 SQL1025NThe database manager was not stopped because databases are still active.

  SQL1025NThe database manager was not stopped because databases are still active.

  需要使用如下命令可以解决这个问题: DB2stop force

  08/03/2005 21:47:49 0 0 SQL1064NDB2STOP processing was successful.

  SQL1064NDB2STOP processing was successful.

  然后启动数据库DB2start,连接数据库DB2s后,重新进行bind即可。

  8、缓冲池参数修改:

  DB2 alter bufferpool ibmdefaultbp size 10240

  查看本表的数据内容如下:DB2 "select * from syscat.bufferpools";

  9、DB2 日志处理:

  DB2日志是以文件的形式存放在文件系统中,分为两种模式:循环日志和归档日志。当创建新数据库时,日志的缺省模式是循环日志。在这种模式下, 只能实现数据库的脱机备份和恢复。如果要实现联机备份和恢复,必须设为归档日志模式。

  目前在综合业务系统中,设置的均是归档日志模式;其它系统(如事后监督、经营决策、中间业务等)一般都设置为循环日志模式。至于采用何种模式, 可以通过修改数据库配置参数(LOGRETAIN)来实现: 归档日志模式:DB2 update db cfg for using logretain on 注:改为on后,查看数据库配置参数logretain的值时,实际显示的是recovery。改变此参数后,再次连接数据库会显示数据库处于备份暂挂 (BACKUP PENDING)状态。这时,需要做一次对数据库的脱机备份(DB2 backup db ),才能使数据库状态变为正常。

  循环日志模式:DB2 update db cfg for using logretain off

  10、DB2 日志处理

  必须按照以下正确的步骤进行操作:

  要求必须使用DB2命令PRUNE进行清理,不建议使用rm命令删除。

  删除前应保证应用已停止(即联机已下来)。

  查看当前使用的日志文件目录及第一活动日志文件

  用 “DB2 get db cfg for ”命令查看日志文件目录(Path to log files)参数,确定数据库当前使用的日志文件目录。 例如:Path to log files = /DB2log/,说明DB2日志存放目录是/DB2log

  用 “DB2 get db cfg for ”命令查看第一活动日志文件(First active log file)参数,该参数对应的日志文件之前的日志文件均为归档日志文件,如果确认没有用,可以删除。 例如:First active log file = S0015913.LOG,说明当前第一活动日志文件是S0015913.LOG。

  备份好要删除的归档日志

  删除归档日志 以应用用户(如BTP)登录,执行:

  $ DB2 connect to

  $ DB2 prune logfile prior to S???????.LOG

  注:S???????.LOG为查看到的第一活动日志文件。此命令可以将当前第一活动日志文件之前的归档日志文件全部删除。

 

      11、如何清理DB2diag.log文件

  DB2diag.log,是用来记录DB2数据库运行中的信息的文件。可以通过此文件,查看记录的有关DB2数据库详细的错误信息。此文件也是 不断增大的,需要定期进行清理。

  可以通过查看实例的配置参数DIAGPATH,来确定DB2diag.log文件是放在哪个目录下:DB2 get dbm cfg 如果Diagnostic data directory path(DIAGPATH) = /home/DB2inst1/sqllib/DB2dump,则此文件是放在/home/DB2inst1/sqllib/DB2dump目录下。当文 件系统/home的使用率达到80%-90%左右时,应及时删除DB2diag.log文件。

  请按以下正确步骤操作:确认应用(如BTP)、DB2已经停止。

  将原DB2diag.log文件备份到其它文件系统下。

  删除DB2diag.log文件。删除后,DB2会自动创建一个新的文件。

  12、Load 操作

  在进行load的时候

  DB2 "load from acmmst.txt of del modified by coldel| replace into acmmst nonrecoverable ”

  由于数据不规范出现错误,强行中断以后,进行操作的时候出现如下错误:

  SQL0668NOperation not allowed for reason code "3" on table "BTP.ACMMST".

  SQLSTATE=57016

  此时,进行反方向操作即可:

  DB2 "load from /dev/null of del terminate into acmmst nonrecoverable"。

  如果没有使用参数nonrecoverable,则会出现数据库状态不正确的情况,使用:

  DB2 list tablesapces show detail 查看状态,如果不是正常状态,则脱机状态进行备份即可。

  两个表文件之间UPDATE的方法:

  DB2 "update cdmcrd set offset = (select cdmlsl.offset from cdmlsl where cdmlsl.crdno=cdmcrd.crdno) where cdmcrd.crdno in (select cdmlsl.crdno from cdmlsl)

  13、多字段条件查询和修改

  表A中的字段有actno, cnlno,bal,pwd;表B中的字段为Actno,Cnlno,TxnAmt;目的是将A表中的bal修改为B表中的TxnAmt,命令:

  DB2 "update A set bal=(select txnamt from B where actno=A.actno and cnlno=A.Cnlno) where A.actno||A.cnlno in (select Actno||cnlno from B );

  14、多条件匹配查询

  查询某个表中条件是B?AAA的记录:

  DB2 "select * from A where actno like "B_AAA%"".

  查询数据中存在某些字符的记录:

  DB2 "select * from A where actno like "%-AAA%".

  15、数据库恢复的处理

  进行数据库恢复的时候使用以下的命令:

restore db db1 to /tstdb2/catalog into db newlogpath /tstdb2/db2log buffer 2048
replace existing redirect parallelism 16;
set tablespace containers for 1 using (path '/tstdb2/db2tmp');
set tablespace containers for 2 using
(device '/dev/rtstcontlv00' 2621440, device '/dev/rtstcontlv01' 2621440,
device '/dev/rtstcontlv02' 2621440, device '/dev/rtstcontlv03' 2621440 ) ;
restore db db1 continue;

  恢复完成以后执行命令DB2s时报如下的错误:

P570:>db2s
SQL1117N A connection to or activation of database "DB" cannot be made
because of ROLL-FORWARD PENDING. SQLSTATE=57019
DB21034E The command was processed as an SQL statement because it was not a
valid Command Line Processor command. During SQL processing it returned:
SQL1024N A database connection does not exist. SQLSTATE=08003

  解决办法如下:

P570:>db2 rollforward db db to end of logs and complete

Rollforward Status

Input database alias = db
Number of nodes have returned status = 1

Node number = 0
Rollforward status = not pending
Next log file to be read =
Log files processed = -
Last committed transaction = 2005-11-20-10.59.23.000000

DB20000I The ROLLFORWARD command completed successfully.

资源简介 第 1章 – DB2 Express-C是什么?..........................................................................................13 1.1免费开发、部署和分发… 无限制!...............................................................................13 1.2用户帮助和技术支持.....................................................................................................14 1.3 DB2服务器..................................................................................................................14 1.4 DB2客户端和驱动........................................................................................................14 1.5 应用程序开发的自由性.................................................................................................15 1.6 DB2 版本号与 DB2 版本分类........................................................................................16 1.7升级到其它的 DB2版本................................................................................................16 1.8 DB2 Express-C的维护.................................................................................................16 1.9相关免费软件................................................................................................................17 1.9.1 IBM数据工作室(Data Studio)...........................................................................17 1.9.2 DB2 Net Search Extender .....................................................................................17 1.9.3 Starter Toolkit for DB2 on Rails.............................................................................17 1.9.4 Web 2.0 Starter Toolkit for DB2 ............................................................................17 1.9.5 WebSphere Application Server – Community Edition............................................18 第 2章 – DB2相关特性和产品................................................................................................19 2.1 DB2 Express-C订购中包含的功能...............................................................................22 2.1.1 Fix packs补丁包...................................................................................................22 2.1.2高可用性灾难恢复(HADR) ................................................................................22 2.1.3数据复制(Data Replication)...............................................................................22 2.2 DB2 Express-C所不具备的功能...................................................................................23 2.2.1数据库分区............................................................................................................23 2.2.2连接集中器(Connection Concentrator ).............................................................23 2.2.3 Geodetic Extender ................................................................................................23 2.2.4工作负载管理(Workload Management, WLM) .......................................................24 2.3 DB2相关收费产品........................................................................................................24 2.3.1 DB2连接(DB2 Connect)...................................................................................24 2.3.2 WebSphere Federation Server..............................................................................24 2.3.3 WebSphere Replication Server .............................................................................25 第 3章 – 安装 DB2..................................................................................................................27 3.1安装前提条件................................................................................................................27 3.2操作系统中的安装权限.................................................................................................27 3.3安装向导.......................................................................................................................27 3.4自动安装.......................................................................................................................31 实验 #1 安装DB2 Express-C,创建 SAMPLE数据库........................................................32 第 4章 – DB2的应用环境.......................................................................................................35 实验 #2 - 创建一个新的数据库............................................................................................43 4.1 DB2配置......................................................................................................................44 4.1.1 环境变量................................................................................................................44 4.1.2 数据库管理器配置文件(dbm cfg) ...........................................................................44 4.1.3 数据库配置文件(db cfg)....................................................................................46 4.1.4 DB2 概要文件注册表.............................................................................................47 4.2 DB2管理服务器...........................................................................................................48 实验 #3 – 实例、数据库和配置管理....................................................................................49 第 5章 – DB2工具..................................................................................................................51 5.1控制中心(Control Center).........................................................................................52 5.2命令编辑器(Command Editor) .................................................................................55 5.3 SQL帮助向导(SQL Assist Wizard ).........................................................................57 5.4 显示SQL按钮..............................................................................................................58 实验 #4 使用脚本填充EXPRESS数据库...........................................................................59 5.5 脚本..............................................................................................................................60 5.5.1 SQL脚本...............................................................................................................60 5.5.2操作系统(shell)脚本..........................................................................................61 实验 #5 为EXPRESS数据库创建一个安装脚本.................................................................62 5.6任务中心(Task Center )...........................................................................................65 5.6.1工具目录(Tools Catalog)数据库........................................................................65 5.7 日志(Journal)...........................................................................................................66 5.8运行状况监视器(Health Monitor ).............................................................................67 5.8.1运行状况中心(Health Center )...........................................................................68 PART II – DB2 Express-C 数据库管......................................................................................71 第 6章 – DB2体系结构...........................................................................................................73 6.1 DB2进程模型...............................................................................................................73 6.2 DB2内存模型...............................................................................................................74 6.3 DB2存储模型...............................................................................................................75 6.3.1数据页和扩展数据块..............................................................................................75 6.3.2缓冲池...................................................................................................................76 6.3.3表空间...................................................................................................................77 第 7章 – DB2 客户端的连接....................................................................................................81 7.1 DB2 目录......................................................................................................................81 7.2 配置助手(Configuration Assistant )..........................................................................82 7.2.1服务器端的安装要求..............................................................................................82 7.2.2 Setup required at the client 客户端的安装要求......................................................84 7.2.3建立客户端与服务器端概要文件............................................................................87 实验 #6 使用配置助手........................................................................................................90 第 8章 – 数据库对象...............................................................................................................93 8.1 模式..............................................................................................................................93 8.2表.................................................................................................................................93 8.2.1数据类型................................................................................................................93 8.2.2标识列...................................................................................................................96 8.2.3序列对象................................................................................................................96 8.2.4系统目录表............................................................................................................97 8.2.5已声明临时表.........................................................................................................97 实验 #7 创建一个数据表.....................................................................................................99 8.3视图............................................................................................................................101 8.4索引............................................................................................................................101 8.4.1 Design Advisor ....................................................................................................101 8.5参照完整性.................................................................................................................102 第 9章 – 数据迁移工具..........................................................................................................105 9.1 导出(EXPORT)工具...............................................................................................106 9.2 导入(IMPORT)工具................................................................................................106 9.3 使用 LOAD来导入......................................................................................................107 9.4 db2move 工具...........................................................................................................108 9.5 db2look 工具..............................................................................................................109 实验 #8 导出EXPRESS数据库的DDL............................................................................111 第 10章 – 数据库安全...........................................................................................................115 10.1 认证..........................................................................................................................116 10.2 授权..........................................................................................................................116 10.3 DBADM权限............................................................................................................118 10.4 PUBLIC 组...............................................................................................................119 10.5 GRANT和REVOKE语句 ........................................................................................119 10.6 查看授权和特权........................................................................................................119 10.7 关于组特权...............................................................................................................121 实验 #9 授予和撤销用户的权限........................................................................................122 第 11章 – 备份和恢复...........................................................................................................125 11.1 数据库的日志记录....................................................................................................125 11.2 日志的类型...............................................................................................................126 11.3 日志记录的类型.......................................................................................................126 11.3.1 循环日志记录 ....................................................................................................126 11.3.2 档案日志记录和日志保留...................................................................................127 11.4 从控制中心进行数据库日志记录...............................................................................127 11.5 日志记录的参数........................................................................................................129 11.6 数据库备份...............................................................................................................129 实验 #10 – 安排一个备份计划..........................................................................................131 11.7 数据库恢复...............................................................................................................133 11.7.1 恢复类型............................................................................................................133 11.7.2 数据库恢复........................................................................................................133 11.8 其他关于备份和恢复的操作......................................................................................134 第 12章 – 维护任务...............................................................................................................135 12.1 重组(REORG)、运行统计(RUNSTATS)、重绑定(REBIND).......................135 12.1.1重组(REORG)命令........................................................................................135 12.1.2运行统计(RUNSTATS)命令 ..........................................................................136 12.1.3 绑定/重新绑定.................................................................................................136 12.1.4 在控制中心执行维护工作...................................................................................137 12.2 维护方式...................................................................................................................139 实验#11 – 配置自动维护.................................................................................................141 第 13章 – 并行与锁定...........................................................................................................143 13.1 事务(Transactions)..............................................................................................143 13.2 并行(Concurrency) ..............................................................................................143 13.3无并行控制导致的问题 .............................................................................................144 13.3.1丢失更新(Lost update)..................................................................................145 13.3.2未落实的读(Uncommitted read)....................................................................145 13.3.3不可重复读(Non-repeatable read).................................................................146 13.3.4幻象(Phantom read)......................................................................................146 13.4隔离级别(Isolation Levels)...................................................................................147 13.4.1未落实的读........................................................................................................147 13.4.2游标稳定性........................................................................................................147 13.4.3读稳定性............................................................................................................148 13.4.4可重复读............................................................................................................148 13.4.5隔离级别对比.....................................................................................................148 13.4.6设定隔离级别.....................................................................................................149 13.5锁定升级...................................................................................................................150 13.6锁定监视...................................................................................................................151 13.7锁定等待...................................................................................................................151 13.8死锁的引发与侦测.....................................................................................................152 13.9并行与锁定的最佳实践:..........................................................................................153 PART III – DB2 Express-C应用程序开发............................................................................155 第 14章 –SQL PL 存储过程..................................................................................................157 14.1 IBM数据工作室(Data Studio)..............................................................................158 14.1.2在Data Studio中创建一个存储过程..................................................................159 14.2 SQL PL 存储过程基础..............................................................................................161 14.2.1存储过程的结构.................................................................................................161 14.2.2 可选的存储过程属性..........................................................................................162 14.2.3参数...................................................................................................................162 14.2.4 SQL PL存储过程中的注释................................................................................163 14.2.5 复合语句............................................................................................................163 14.2.6 变量声明............................................................................................................163 14.2.7 赋值语句............................................................................................................164 14.3 游标..........................................................................................................................164 14.4 流控制......................................................................................................................164 14.5 调用存储过程 ...........................................................................................................165 14.6 错误和情况处理器....................................................................................................166 14.7 动态SQL..................................................................................................................168 第 15章 – 直接插入 SQL 过程语言、触发器、用户定义函数(UDF)..................................169 15.1直接插入SQL PL .....................................................................................................169 15.2 触发器(Trigger)....................................................................................................170 15.2.1 触发器的类型 ....................................................................................................170 实验 #12 从控制中心创建一个触发器...............................................................................174 15.3 用户定义函数 (UDF).................................................................................................177 15.3.1 标量函数(Scalar function).............................................................................177 15.3.2 表函数(Table function)..................................................................................178 实验 #13 使用IBM Data Studio创建用户定义函数(UDF)............................................179 第 16章 – DB2 pureXML......................................................................................................181 16.1 在数据库中使用XML................................................................................................181 16.2 XML数据库..............................................................................................................182 16.2.1 启用 XML的数据库............................................................................................182 16.2.2 原生 XML数据库...............................................................................................182 16.3 DB2中的XML..........................................................................................................183 16.3.1 pureXML 技术优势............................................................................................184 16.3.2 XPath基础........................................................................................................185 16.3.3 XQuery的定义..................................................................................................188 16.3.4 插入 XML文档...................................................................................................189 16.3.5 查询 XML数据...................................................................................................191 16.3.6 使用 SQL/XML执行联合操作............................................................................196 16.3.7 使用 XQuery执行联合操作................................................................................196 16.3.8 更新与删除操作.................................................................................................197 16.3.9 XML 索引.........................................................................................................198 实验 #14 - SQL/XML 和 XQuery.......................................................................................200 第 17章 – 使用 Java、PHP和 Ruby进行数据库应用开发...................................................201 17.1 Java应用程序开发...................................................................................................201 17.1.1 JDBC类型 2驱动程序.......................................................................................201 17.1.2 JDBC类型 4驱动程序.......................................................................................202 17.2 PHP应用程序开发...................................................................................................203 17.2.1 DB2为PHP提供的连接选项.............................................................................203 17.2.2 Zend Core for IBM.............................................................................................204 17.3 Ruby on Rails应用程序开发.....................................................................................206 17.3.1 Startup Toolkit for DB2 on Rails ........................................................................206 附录 A — 排除故障...............................................................................................................207 A.1 查找错误代码的更多信息...........................................................................................207 A.2 SQLCODE与SQLSTATE .........................................................................................208 A.3 DB2 管理通知日志.....................................................................................................208 A.4 db2diag.log................................................................................................................209 A.5 CLI追踪.....................................................................................................................209 A.6 DB2缺陷与补丁.........................................................................................................209 参考资源 ...............................................................................................................................210 网站..................................................................................................................................210 书籍..................................................................................................................................211
PART I – 概览.........................................................................................................................11 第 1章 – DB2 Express-C是什么?..........................................................................................13 1.1免费开发、部署和分发… 无限制!...............................................................................13 1.2用户帮助和技术支持.....................................................................................................14 1.3 DB2服务器..................................................................................................................14 1.4 DB2客户端和驱动........................................................................................................14 1.5 应用程序开发的自由性.................................................................................................15 1.6 DB2 版本号与 DB2 版本分类........................................................................................16 1.7升级到其它的 DB2版本................................................................................................16 1.8 DB2 Express-C的维护.................................................................................................16 1.9相关免费软件................................................................................................................17 1.9.1 IBM数据工作室(Data Studio)...........................................................................17 1.9.2 DB2 Net Search Extender .....................................................................................17 1.9.3 Starter Toolkit for DB2 on Rails.............................................................................17 1.9.4 Web 2.0 Starter Toolkit for DB2 ............................................................................17 1.9.5 WebSphere Application Server – Community Edition............................................18 第 2章 – DB2相关特性和产品................................................................................................19 2.1 DB2 Express-C订购中包含的功能...............................................................................22 2.1.1 Fix packs补丁包...................................................................................................22 2.1.2高可用性灾难恢复(HADR) ................................................................................22 2.1.3数据复制(Data Replication)...............................................................................22 2.2 DB2 Express-C所不具备的功能...................................................................................23 2.2.1数据库分区............................................................................................................23 2.2.2连接集中器(Connection Concentrator ).............................................................23 2.2.3 Geodetic Extender ................................................................................................23 2.2.4工作负载管理(Workload Management, WLM) .......................................................24 2.3 DB2相关收费产品........................................................................................................24 2.3.1 DB2连接(DB2 Connect)...................................................................................24 2.3.2 WebSphere Federation Server..............................................................................24 2.3.3 WebSphere Replication Server .............................................................................25 第 3章 – 安装 DB2..................................................................................................................27 3.1安装前提条件................................................................................................................27 3.2操作系统中的安装权限.................................................................................................27 3.3安装向导.......................................................................................................................27 3.4自动安装.......................................................................................................................31 实验 #1 安装DB2 Express-C,创建 SAMPLE数据库........................................................32 第 4章 – DB2的应用环境.......................................................................................................35 实验 #2 - 创建一个新的数据库............................................................................................43 4.1 DB2配置......................................................................................................................44 4.1.1 环境变量................................................................................................................44 4.1.2 数据库管理器配置文件(dbm cfg) ...........................................................................44 4.1.3 数据库配置文件(db cfg)....................................................................................46 4.1.4 DB2 概要文件注册表.............................................................................................47 4.2 DB2管理服务器...........................................................................................................48 实验 #3 – 实例、数据库和配置管理....................................................................................49 第 5章 – DB2工具..................................................................................................................51 5.1控制中心(Control Center).........................................................................................52 5.2命令编辑器(Command Editor) .................................................................................55 5.3 SQL帮助向导(SQL Assist Wizard ).........................................................................57 5.4 显示SQL按钮..............................................................................................................58 实验 #4 使用脚本填充EXPRESS数据库...........................................................................59 5.5 脚本..............................................................................................................................60 5.5.1 SQL脚本...............................................................................................................60 5.5.2操作系统(shell)脚本..........................................................................................61 实验 #5 为EXPRESS数据库创建一个安装脚本.................................................................62 5.6任务中心(Task Center )...........................................................................................65 5.6.1工具目录(Tools Catalog)数据库........................................................................65 5.7 日志(Journal)...........................................................................................................66 5.8运行状况监视器(Health Monitor ).............................................................................67 5.8.1运行状况中心(Health Center )...........................................................................68 PART II – DB2 Express-C 数据库管......................................................................................71 第 6章 – DB2体系结构...........................................................................................................73 6.1 DB2进程模型...............................................................................................................73 6.2 DB2内存模型...............................................................................................................74 6.3 DB2存储模型...............................................................................................................75 6.3.1数据页和扩展数据块..............................................................................................75 6.3.2缓冲池...................................................................................................................76 6.3.3表空间...................................................................................................................77 第 7章 – DB2 客户端的连接....................................................................................................81 7.1 DB2 目录......................................................................................................................81 7.2 配置助手(Configuration Assistant )..........................................................................82 7.2.1服务器端的安装要求..............................................................................................82 7.2.2 Setup required at the client 客户端的安装要求......................................................84 7.2.3建立客户端与服务器端概要文件............................................................................87 实验 #6 使用配置助手........................................................................................................90 第 8章 – 数据库对象...............................................................................................................93 8.1 模式..............................................................................................................................93 8.2表.................................................................................................................................93 8.2.1数据类型................................................................................................................93 8.2.2标识列...................................................................................................................96 8.2.3序列对象................................................................................................................96 8.2.4系统目录表............................................................................................................97 8.2.5已声明临时表.........................................................................................................97 实验 #7 创建一个数据表.....................................................................................................99 8.3视图............................................................................................................................101 8.4索引............................................................................................................................101 8.4.1 Design Advisor ....................................................................................................101 8.5参照完整性.................................................................................................................102 第 9章 – 数据迁移工具..........................................................................................................105 9.1 导出(EXPORT)工具...............................................................................................106 9.2 导入(IMPORT)工具................................................................................................106 9.3 使用 LOAD来导入......................................................................................................107 9.4 db2move 工具...........................................................................................................108 9.5 db2look 工具..............................................................................................................109 实验 #8 导出EXPRESS数据库的DDL............................................................................111 第 10章 – 数据库安全...........................................................................................................115 10.1 认证..........................................................................................................................116 10.2 授权..........................................................................................................................116 10.3 DBADM权限............................................................................................................118 10.4 PUBLIC 组...............................................................................................................119 10.5 GRANT和REVOKE语句 ........................................................................................119 10.6 查看授权和特权........................................................................................................119 10.7 关于组特权...............................................................................................................121 实验 #9 授予和撤销用户的权限........................................................................................122 第 11章 – 备份和恢复...........................................................................................................125 11.1 数据库的日志记录....................................................................................................125 11.2 日志的类型...............................................................................................................126 11.3 日志记录的类型.......................................................................................................126 11.3.1 循环日志记录 ....................................................................................................126 11.3.2 档案日志记录和日志保留...................................................................................127 11.4 从控制中心进行数据库日志记录...............................................................................127 11.5 日志记录的参数........................................................................................................129 11.6 数据库备份...............................................................................................................129 实验 #10 – 安排一个备份计划..........................................................................................131 11.7 数据库恢复...............................................................................................................133 11.7.1 恢复类型............................................................................................................133 11.7.2 数据库恢复........................................................................................................133 11.8 其他关于备份和恢复的操作......................................................................................134 第 12章 – 维护任务...............................................................................................................135 12.1 重组(REORG)、运行统计(RUNSTATS)、重绑定(REBIND).......................135 12.1.1重组(REORG)命令........................................................................................135 12.1.2运行统计(RUNSTATS)命令 ..........................................................................136 12.1.3 绑定/重新绑定.................................................................................................136 12.1.4 在控制中心执行维护工作...................................................................................137 12.2 维护方式...................................................................................................................139 实验#11 – 配置自动维护.................................................................................................141 第 13章 – 并行与锁定...........................................................................................................143 13.1 事务(Transactions)..............................................................................................143 13.2 并行(Concurrency) ..............................................................................................143 13.3无并行控制导致的问题 .............................................................................................144 13.3.1丢失更新(Lost update)..................................................................................145 13.3.2未落实的读(Uncommitted read)....................................................................145 13.3.3不可重复读(Non-repeatable read).................................................................146 13.3.4幻象(Phantom read)......................................................................................146 13.4隔离级别(Isolation Levels)...................................................................................147 13.4.1未落实的读........................................................................................................147 13.4.2游标稳定性........................................................................................................147 13.4.3读稳定性............................................................................................................148 13.4.4可重复读............................................................................................................148 13.4.5隔离级别对比.....................................................................................................148 13.4.6设定隔离级别.....................................................................................................149 13.5锁定升级...................................................................................................................150 13.6锁定监视...................................................................................................................151 13.7锁定等待...................................................................................................................151 13.8死锁的引发与侦测.....................................................................................................152 13.9并行与锁定的最佳实践:..........................................................................................153 PART III – DB2 Express-C应用程序开发............................................................................155 第 14章 –SQL PL 存储过程..................................................................................................157 14.1 IBM数据工作室(Data Studio)..............................................................................158 14.1.2在Data Studio中创建一个存储过程..................................................................159 14.2 SQL PL 存储过程基础..............................................................................................161 14.2.1存储过程的结构.................................................................................................161 14.2.2 可选的存储过程属性..........................................................................................162 14.2.3参数...................................................................................................................162 14.2.4 SQL PL存储过程中的注释................................................................................163 14.2.5 复合语句............................................................................................................163 14.2.6 变量声明............................................................................................................163 14.2.7 赋值语句............................................................................................................164 14.3 游标..........................................................................................................................164 14.4 流控制......................................................................................................................164 14.5 调用存储过程 ...........................................................................................................165 14.6 错误和情况处理器....................................................................................................166 14.7 动态SQL..................................................................................................................168 第 15章 – 直接插入 SQL 过程语言、触发器、用户定义函数(UDF)..................................169 15.1直接插入SQL PL .....................................................................................................169 15.2 触发器(Trigger)....................................................................................................170 15.2.1 触发器的类型 ....................................................................................................170 实验 #12 从控制中心创建一个触发器...............................................................................174 15.3 用户定义函数 (UDF).................................................................................................177 15.3.1 标量函数(Scalar function).............................................................................177 15.3.2 表函数(Table function)..................................................................................178 实验 #13 使用IBM Data Studio创建用户定义函数(UDF)............................................179 第 16章 – DB2 pureXML......................................................................................................181 16.1 在数据库中使用XML................................................................................................181 16.2 XML数据库..............................................................................................................182 16.2.1 启用 XML的数据库............................................................................................182 16.2.2 原生 XML数据库...............................................................................................182 16.3 DB2中的XML..........................................................................................................183 16.3.1 pureXML 技术优势............................................................................................184 16.3.2 XPath基础........................................................................................................185 16.3.3 XQuery的定义..................................................................................................188 16.3.4 插入 XML文档...................................................................................................189 16.3.5 查询 XML数据...................................................................................................191 16.3.6 使用 SQL/XML执行联合操作............................................................................196 16.3.7 使用 XQuery执行联合操作................................................................................196 16.3.8 更新与删除操作.................................................................................................197 16.3.9 XML 索引.........................................................................................................198 实验 #14 - SQL/XML 和 XQuery.......................................................................................200 第 17章 – 使用 Java、PHP和 Ruby进行数据库应用开发...................................................201 17.1 Java应用程序开发...................................................................................................201 17.1.1 JDBC类型 2驱动程序.......................................................................................201 17.1.2 JDBC类型 4驱动程序.......................................................................................202 17.2 PHP应用程序开发...................................................................................................203 17.2.1 DB2为PHP提供的连接选项.............................................................................203 17.2.2 Zend Core for IBM.............................................................................................204 17.3 Ruby on Rails应用程序开发.....................................................................................206 17.3.1 Startup Toolkit for DB2 on Rails ........................................................................206 附录 A — 排除故障...............................................................................................................207 A.1 查找错误代码的更多信息...........................................................................................207 A.2 SQLCODE与SQLSTATE .........................................................................................208 A.3 DB2 管理通知日志.....................................................................................................208 A.4 db2diag.log................................................................................................................209 A.5 CLI追踪.....................................................................................................................209 A.6 DB2缺陷与补丁.........................................................................................................209 参考资源 ...............................................................................................................................210 网站..................................................................................................................................210 书籍..................................................................................................................................211
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