循环批量更新的的存储过程(属于转载)

CREATE PROCEDURE  addusermodule
@ModuleId_Array  varChar(2000),
@UserId int
AS
DECLARE  @PointerPrev int
DECLARE @PointerCurr  int
DECLARE  @TId int
Set @PointerPrev=1
set  @PointerCurr=1

begin transaction
Set NoCount  ON
delete  from tests where userid=@UserId

Set @PointerCurr=CharIndex (',',@ModuleId_Array ,@PointerPrev+1)
set @TId=cast (SUBSTRING(@ModuleId_Array,@PointerPrev ,@PointerCurr-@PointerPrev)  as int)
Insert into tests (userid,moduleid)  Values(@UserId,@TId)
SET @PointerPrev =  @PointerCurr
while  (@PointerPrev+1  < LEN(@ModuleId_Array))
Begin
Set  @PointerCurr=CharIndex( ',',@ModuleId_Array, @PointerPrev+1)
if(@PointerCurr> 0)
Begin
set @TId=cast (SUBSTRING(@ModuleId_Array,@PointerPrev +1,@PointerCurr- @PointerPrev-1) as  int)
Insert into tests (userid,moduleid) Values (@UserId,@TId)
SET @PointerPrev =  @PointerCurr
End
else
Break
End

set @TId=cast(SUBSTRING(@ModuleId_Array,@PointerPrev+ 1,LEN(@ModuleId_Array )-@PointerPrev) as  int)
Insert into tests (userid,moduleid) Values (@UserId,@TId)

delete from tests  where moduleid =0
Set NoCount OFF
if @@error= 0
begin
commit transaction
end
else
begin
rollback transaction
end
GO