修也

select concat(LAST_DAY("2019-09-01")," 23:59:59") ;取每月最初的时刻 用 interval关键字然后用 日期函数 add 等操作

仿SQL结构:<begin statement> begin [isolation level (read committed|repeatable read)] begin isolation level read committed<commit statement> commit<abort statement> abort<create statement> create table &

#!/bin/shINTERVAL=5PREFIX=$INTERVAL-sec-statusRUNFILE=/home/benchmarks/running #not exist!!!ACCOUNT='-uroot -p123456'mysql world $ACCOUNT -e 'SHOW GLOBAL VARIABLES' >> mysql-variables# while test -e $RUNFILE;do file=$(date +%F_%I) sle.

Myfault solving：<select id="findUserByNameAndPasswd" resultType="com.xiuye.orm.User" parameterType="string"> select * from user where username = #{0} and password=#{1} <select id="findUserB

package com.xiuye.bean;public class TestForUpdate { private String uuid; private String content; private int state; public int getState() { return state; } public void setState(int state

select sum(inout) as sum from UserTable;查询空表会有一条数据,只是值为空(不是null)而已

solution:cp mysql/scripts/data/mysql mysql/dataservice mysql55 startIf that service doesn't exist,you have to copy mysql/support-files/mysql.server to /etc/init.d/mysql55cp mysql/support

apt-get install libncurses5-devfind /usr -name libncurses*mysql-5.6.38$ cmake . -DCURSES_LIBRARY=/usr/lib/x86_64-linux-gnu/libncurses.so -DCURSES_INCLUDE_PATH=/usr/includemake

> use testswitched to db test> db.createUser({user:"xiuye",pwd:"123456",roles:[]})Successfully added user: { "user" : "xiuye", "roles" : [ ] }> show tables;system.userssystem.version> db.system

example : 查询 学生中 某科目 不及格, 平均分数 最大 的学生:create table student(id number primary key,name varchar2(10),subject varchar2(20),score number);select * from user_tables;select abs(mod(dbms_random.rando...

select @@sql_mode;set global sql_mode='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION'set session sql_mode='STRICT_TRANS_TA...

1.首先,找到spring boot的默认的事务管理器,一般继承至于org.springframework.transaction.PlatformTransactionManager2.设置事务管理器打印log,应该包含开始事务,结束事务的输出日志.eg.我的工程包含JPA,MyBatis,在Service层编写异常,测试事务是否回滚:@Transactional @Override pub...

数据库中的char分配多少位，查询条件就是多少位，写入数据的时候，不足的补空格，而varchar/varchar2则是按需分配，不足位数，不补空格，查询条件不需补足位数。明明查询语句是对的，条件也是对的，为啥查不出结果，是不是因为char补位数“空格”，该死的char类型！

C:\Users\Administrator>sc qc mysql56[SC] QueryServiceConfig 成功SERVICE_NAME: mysql56 TYPE : 10 WIN32_OWN_PROCESS START_TYPE : 3 DEMAND_START ERROR_

if object_id('#case') is not null drop table #casegocreate table #case( id int identity ,issue_type varchar(20) null,asset_id int null)go insert into #case select 'for issue',1701335119

select a.name+' ' +case a.usertype when 7 then 'int' when 6 then 'smallint' when 2 then 'varchar' when 11 then 'money' when 1 then 'char' when 8 then 'float' when 12 then 'datetime' wh

OracleVssWriterORCLf:\app\xiuye\product\11.2.0\dbhome_1\bin\OraVSSW.exe ORCLOracleDBConsoleorclF:\app\xiuye\product\11.2.0\dbhome_1\bin\nmesrvc.exeOracleJobSchedulerORCLf:\app\xiuye\product\11.

<!DOCTYPE hibernate-configuration PUBLIC"-//Hibernate/Hibernate Configuration DTD 3.0//EN""http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"><property name="connection.driver_class"

sp_password 'old pass','new pass'go

select serial.currval from dual;//mybe error刚创建的sequence的currval可能还没有值必须：select serial.nextval from dual 后才能有效执行以上语句

jdbc:mysql://127.0.0.1:3306/tienonweb?useUnicode=true&characterEncoding=utf8注意为utf8

错误的思路sql语句：select rownum,a.id,a.deptno FROM (select emp.* from emp where state=1 order by deptno asc) a where rownum 错误原因：SQL 错误: ORA-02014: 不能从具有 DISTINCT, GROUP BY 等的视图选择 FOR UPDATE02014. 00

在xml配置文件中，不要多加分号哈，尤其是在其sql语句后。

set serveroutput on; declare --类型定义 cursor cc is select empno,ename,job,sal from emp; --定义一个游标变量 ccrec cc%rowtype; begin --for循环 for

create sequence id;update app set id = id.nextvalcommit;

L_ADVANTAGE
11.1?if object_id('#case') is not null drop table #casecreate table #case( id int identity ,issue_type varchar(20) null,asset_id int null)go insert into #case select 'for iss