table a
aid date userID title
table b
bid aid title date userID
table c
userID username
查 出 a.aid a.date a.title b.bid b.title b.date c.username
跟据 aid 对应 的最后时间 插入的记录
各位 大虾 帮帮忙
------解决方案--------------------
- SQL code
select a.aid, a.date, a.title, b.bid, b.title, b.date,(select username from tablec where userID=a.userID)usernamefrom tablea a inner join tableb b on a.aid=b.aidwhere not exists(select 1 from tableb where aid=b.aid and date>b.date)