一个常见得查询问题
有一表A的字段有ID(identity(1,1)),cellid,price,owedate
数据为 1, 101, 3000 2001-10-01
2, 101, 2500 2001-10-11
3, 102, 2800 2001-11-01
.........
现在想根据cellid 进行分组查询,得出owedate日期最新的一条记录的SQL语句该怎么写?
比如得出结果为
id cellid price owedate
2 101 2500 2001-10- 11
3 102 2800 2001-11-01
........
不知说清楚了没有! thinks
------解决方案--------------------最容易理解的一种
select * from A where owedate in (select max(owedate) owedate from A group by cellid)
------解决方案--------------------select a.* from A a,
(select ID=max(ID),owedate=max(owedate) from A group by cellid) b
where a.ID=b.ID