DB2常用命令大全1

最新推荐文章于 2022-01-23 20:17:54 发布

最新推荐文章于 2022-01-23 20:17:54 发布 · 158 阅读

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#DB2 #数据结构

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    1. 建立数据库DB2_GCB
    CREATE DATABASE DB2_GCB ON G: ALIAS DB2_GCB
    USING CODESET GBK TERRITORY CN COLLATE USING SYSTEM DFT_EXTENT_SZ 32

2. 连接数据库
connect to sample1 user db2admin using 8301206

    3. 建立别名
    create alias db2admin.tables for sysstat.tables;
    CREATE ALIAS DB2ADMIN.VIEWS FOR SYSCAT.VIEWS
    create alias db2admin.columns for syscat.columns;
    create alias guest.columns for syscat.columns;

    4. 建立表
    create table zjt_tables as
    (select * from tables) definition only;
    create table zjt_views as
    (select * from views) definition only;

    5. 插入记录
    insert into zjt_tables select * from tables;
    insert into zjt_views select * from views;

6. 建立视图
create view V_zjt_tables as select tabschema,tabname from zjt_tables;

    7. 建立触发器
    CREATE TRIGGER zjt_tables_del
    AFTER DELETE ON zjt_tables
    REFERENCING OLD AS O
    FOR EACH ROW MODE DB2SQL
    Insert into zjt_tables1 values(substr(o.tabschema,1,8),substr(o.tabname,1,10))

    8. 建立唯一性索引
    CREATE UNIQUE INDEX I_ztables_tabname
    ON zjt_tables(tabname);

    9. 查看表
    select tabname from tables
    where tabname='ZJT_TABLES';

    10. 查看列
    select SUBSTR(COLNAME,1,20) as 列名,TYPENAME as 类型,LENGTH as 长度
    from columns
    where tabname='ZJT_TABLES';

    11. 查看表结构
    db2 describe table user1.department
    db2 describe select * from user.tables

12. 查看表的索引
db2 describe indexes for table user1.department

    13. 查看视图
    select viewname from views
    where viewname='V_ZJT_TABLES';

    14. 查看索引
    select indname from indexes
    where indname='I_ZTABLES_TABNAME';

    15. 查看存贮过程
    SELECT SUBSTR(PROCSCHEMA,1,15),SUBSTR(PROCNAME,1,15)
    FROM SYSCAT.PROCEDURES;

    16. 类型转换(cast)
    ip datatype:varchar
    select cast(ip as integer)+50 from log_comm_failed

17. 重新连接
connect reset

18. 中断数据库连接
disconnect db2_gcb

19. view application
LIST APPLICATION;