TABLE
---------------
ID | NAME
---------------
A 110
A 120
B 110
B 120
C 110
D 120
E 120
查询结果应为
---------------
ID | NAME
---------------
A 110
B 110
C 110
D 120
SQL如何写？
------解决方案--------------------
--创建测试数据
declare @t table(ID char(1),NAME int)
insert @t select 'A ',110
union all select 'A ',120
union all select 'B ',110
union all select 'B ',120
union all select 'C ',110
union all select 'D ',120
union all select 'E ',120
--查看测试数据
select * from @t
--查看结果
select * from @t a where not exists
(select 1 from @t where id=a.id and name <a.name)
/*
ID NAME
---- -----
A 110
B 110
C 110
D 120
E 120
（所影响的行数为 5 行）
*/