mysql-sample sql_MySQL

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

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%';