TSQL查询给定记录的相关数据

具体环境为SQL 2000 ,在一内容表中给定一条记录,查寻编号大于这里记录的的数据,具体代码如下

Create Proc CMST_QueryInterrelated

@ID int, ----给定的记录的主键

@Num int ---需要条数

As

Declare @RNum int

Declare @SQL nvarchar(2000)

Set @SQL=''

Set @RNum=0

Select @RNum=Count(ID) From [CMST] Where [ID]> @ID

If(@RNum-@Num) > 0

Begin

Set @SQL='Select Top '+ cast(@Num as nvarchar) +' ID,Title,AddTime From [CMST] Where [ID]>' + cast(@Id as nvarchar)

End

Else

Begin

Set @SQL='Select Top '+ cast(@Num as nvarchar) +' ID,Title,AddTime From [CMST] Where [ID]>' + cast(@Id as nvarchar)

+ 'Union Select Top ' + cast((@Num-@RNum) as nvarchar) +' ID,Title From [CMST] Where [ID] < ' + cast(@Id as nvarchar) End

Exec (@SQL)

上面的功能是,返回比给定ID 大的 @Num 条数据,如果 比ID大的记录不足@Num条,那么少的部分由ID比@ID小的记录获取(形成一个环型),另外你可以在 where 里加入其他条件比方同一分类等等..