MySQL join 用法
摘要:
select column1, column2 from TABLE1 join TABLE2 on 条件 # select * from table1 join table2; #两个表合成一个select a.*, b.* from a left join b where a.id=b.id limit 0,1; on 条件 where/ group by / having/ ... 阅读全文
posted @ 2017-06-24 14:50 Perl6 阅读(428) 评论(0) 推荐(0) 编辑