sql service 游标和触发器的使用

declare @id nvarchar(20)
DECLARE My_Cursor CURSOR --定义游标
FOR (select autoid from U_VoucherItems where CardNum='k006' and CardSection='B') --查出需要的集合放到游标中
OPEN My_Cursor; --打开游标
FETCH NEXT FROM My_Cursor  INTO @id; --读取第一行数据
WHILE @@FETCH_STATUS = 0
BEGIN
update U_VoucherItems set CardItemNum=(select MAX(CardItemNum)+1 from U_VoucherItems where CardNum='k006' and CardSection='B'
) where CardNum='k006' and autoid=@id

FETCH NEXT FROM My_Cursor  INTO @id; --读取第一行数据

END
CLOSE My_Cursor; --关闭游标
DEALLOCATE My_Cursor; --释放游标

/****** Object:  Trigger [dbo].[tgr_changeprice_delete]    Script Date: 03/25/2016 11:33:41 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
Create   trigger [dbo].[tgr_changeprice_delete]
on [dbo].[SA_SaleDelivery_b]
instead of delete
as
declare @s_jsQuantity nvarchar(100),@zQuantity nvarchar(100),@s_wjsQuantity nvarchar(100),
@ClearingMoney nvarchar(100),@yxQuantity nvarchar(100),@NotClearingMoney nvarchar(100),
@Price nvarchar(100),@changepricedetailerid nvarchar(100); --定义变量
DECLARE My_Cursor CURSOR --定义游标
FOR (select quantity2,quantity,OrigDiscountPrice,sourceVoucherDetailId from deleted) --查出需要的集合放到游标中
OPEN My_Cursor; --打开游标
FETCH NEXT FROM My_Cursor  INTO @zQuantity,@s_jsQuantity,@Price,@changepricedetailerid; --读取第一行数据
if(@changepricedetailerid is not null)   --判断
begin
print 'start......'
WHILE @@FETCH_STATUS = 0
BEGIN
set @s_wjsQuantity=CONVERT (decimal(19,2),@s_jsQuantity);
set @ClearingMoney=CONVERT (decimal(19,2),@Price)*CONVERT (decimal(19,2),@s_jsQuantity);
set @NotClearingMoney=CONVERT (decimal(19,2),@Price)*CONVERT (decimal(19,2),@s_wjsQuantity);

update nsc_changeprice_b set
yxQuantity= yxQuantity+CONVERT (decimal(19,2),@s_jsQuantity),
jsQuantity=jsQuantity-CONVERT (decimal(19,2),@s_jsQuantity),
wjsQuantity=wjsQuantity+CONVERT (decimal(19,2),@s_wjsQuantity),
ClearingMoney=ClearingMoney-CONVERT (decimal(19,2),@ClearingMoney),
NotClearingMoney=NotClearingMoney+CONVERT (decimal(19,2),@NotClearingMoney)
where id=@changepricedetailerid
FETCH NEXT FROM My_Cursor  INTO @zQuantity,@s_jsQuantity,@Price,@changepricedetailerid; --读取第一行数据
END
CLOSE My_Cursor; --关闭游标
DEALLOCATE My_Cursor; --释放游标
end

else
begin
print 'end.....'
--rollback transaction --回滚﹐避免加入
end