当前位置:Gxlcms > mysql > mysql-samplesql_MySQL

mysql-samplesql_MySQL

时间:2021-07-01 10:21:17 帮助过:15人阅读

1) show databases;

2) use db; 进入到数据库db

3) select database(); --显示当前数据库

4) select "consstr" as colname, t.* from tableName t;

5) select a.id,a.valueA, case (b.valueB is NULL) when 1 then 'z' else b.valueB end from tableA as a left join tableB as b on(id);

6)导入.sql脚本:

  在命令行下:mysql -h *** -u *** -p <***.sql

进入到mysql,在mysql>命令行下: source **.sql


7)在mysql中可以让查询结果的每行竖排列,只需要用/G代替查询语句末尾的分号即可。如:

  select * from test limit 10 /G

8)show tables like '%name%';

人气教程排行