MySQL左联多表查询where条件写法示例

时间：2021-03-02 11:48:35 | 栏目：Mysql | 点击：次

select * from _test a left join _test b on a.id=b.id where a.level='20' and a.month='04' and b.level='20' and b.month='03';

select a.*,b.* from (select * from _test where level='20' and month='04') as a left join (select * from _test where level='20' and month='03') as b on a.id=b.id;