--> 测试数据：[a]
if object_id('[a]') is not null drop table [a]
go
create table [a]([id] int,[品名] varchar(6),[入库数量] int,[入库时间] datetime)
insert [a]
select 1,'矿泉水',100,'2013-01-02' union all
select 2,'方便面',60,'2013-01-03' union all
select 3,'方便面',50,'2013-01-03' union all
select 4,'矿泉水',80,'2013-01-04' union all
select 5,'方便面',50,'2013-01-05'
select a.[品名],a.[入库数量],b.[最后入库时间] from [test] a ,
(select [品名],max([入库时间]) as '最后入库时间' from [test] group by [品名]) b
where a.[品名]=b.[品名]
/*
品名 入库数量 最后入库时间
------ ----------- -----------------------
方便面 60 2013-01-05 00:00:00.000
方便面 50 2013-01-05 00:00:00.000
方便面 50 2013-01-05 00:00:00.000
矿泉水 100 2013-01-04 00:00:00.000
矿泉水 80 2013-01-04 00:00:00.000
(5 行受影响)
*/
，