sql 取各组中的最大值

表test

id               name      record
1                 a         88
2                 b         76
3                 c         66

4                 c         90
5                 b         77
6                 a         56

7                 b         77
8                 c         67
9                 a         44
获取a b c...的最大记录数的id号
select hh.id,hh.name,hh.record from test as hh where
hh.record = (select max(record) from test  where name=hh.name)

原文转自：http://www.ltesting.net