TSQL查詢給定記錄的相關資料

具體環境為sql 2000 ,在一內容表中給定一條記錄,查尋編號大於這裡記錄的的資料,具體**如下

create proc cmst_queryinterrelated

@id int, ----給定的記錄的主鍵

@num int ---需要條數

asdeclare @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)

endelse

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,返回比給定id 大的 @num 條資料,如果比id大的記錄不足@num條,那麼少的部分由id比@id小的記錄獲取(形成乙個環型),另外你可以在 where 裡加入其他條件比方同一分類等等..