SQL 循环遍历

一：遍历 数据表

select HID into #temp from MD_SheetTemplate where SheetStateID=1

declare @HID varchar(50)

WHILE EXISTS( select HID from #temp ) ---遍历临时表

begin

select top 1 @HID=HID from #temp

print @HID

delete from #temp where hid=@HID

end

二：遍历字符串

ALTER PROCEDURE [dbo].[sp_pro_pw]

@wcode varchar(10),

@pcode varchar(500)

AS

BEGIN

SET NOCOUNT ON;

set @pcode=@pcode+','; --删除最后一个,因为最后一个后面没有逗号,所以在循环中跳出,需另外再删除

DECLARE @PointerPrev int

DECLARE @PointerCurr int

DECLARE @TId int

DECLARE @COUNT int

DECLARE @Newcode varchar(500)

Set @PointerPrev=1

while (@PointerPrev < LEN(@pcode))

Begin

Set @PointerCurr=CharIndex(',',@pcode,@PointerPrev)

if(@PointerCurr>0)

Begin

set @TId=cast(SUBSTRING(@pcode,@PointerPrev,@PointerCurr-@PointerPrev) as int)

select @COUNT=count(*) from zCheckWork_WP where wcode=@wcode and pcode=@TId

if(@COUNT=0)

begin

INSERT INTO [zCheckWork_WP]

([wCode]

,[PCode])

VALUES(@wcode,@TId);

end

SET @PointerPrev = @PointerCurr+1

End

else

Break

End

--删除已存在的数据

delete from zCheckWork_WP where wcode=@wcode and pcode not in( select str2table from StrToTable(@pcode))

return 1

END