mysql查询差集
摘要：
select A.* from A left join B using(name,addr,age) where B.name is NULL;select A.* from A left join B on A.id=B.Aid where ISNULL(B.name);查询两个表中的差集，用IS... 阅读全文
posted @ 2015-01-09 21:32 walter371 阅读(1623) 评论(0) 推荐(0) 编辑
