2016年12月14日

mysql JOIN
摘要： mysql join语法 eg1: select * from biao1 AS b1 left join biao2 AS b2 ON b1.id=b2.id AND b2.name!=NULL; eg2: select * from biao1 AS b1 left join biao2 AS 阅读全文
posted @ 2016-12-14 10:29 allen__ 阅读(188) 评论(0) 推荐(0)

导航