复制代码 代码如下: --建立数据表createtable TestData ( ID int identity(1,1) primary key, Data int, ColA varchar(20), ColB varchar(20) ) go --插入测试数据 declare @counts int declare @i int set @counts = 10000 set @i = 1 wh
复制代码 代码如下: --建立数据表createtable TestData ( ID int identity(1,1) primary key, Data int, ColA varchar(20), ColB varchar(20) ) go --插入测试数据 declare @counts int declare @i int set @counts = 10000 set @i = 1 while @i<=@counts begin insert TestData (Data,ColA,ColB) values(cast(rand()*10000 as int),cast(rand() as varchar(20)),cast(rand() as varchar(20))) set @i=@i+1 end --获取数据(重复数据只取一条) select * from TestData where id in ( --根据Data分类获取数据最小ID列表 select min(id) from TestData group by Data )
