做购物车系统时利用到得几个sqlserver 存储过程

/* @store_sum表示要添加的商品数量,添加同时确认购物车中自己已有的数量与将要加入的数量之和是否超过库存 */
CREATE proc ncp_Cart_Add
(
@store_id int,
@store_sum int=1,
@member_id int
)
as

DECLARE @Amount int
DECLARE @NowAmount int
Begin
select @Amount=(select amount from ncp_store where id=@store_id)
IF EXISTS(SELECT 1 FROM [ncp_cart] WHERE store_id=@store_id and member_id=@member_id)
Begin
select @NowAmount=(select store_sum+@store_sum from ncp_cart WHERE store_id=@store_id and member_id=@member_id)
if @NowAmount>@Amount
return 0
else
UPDATE [ncp_cart] SET store_sum=store_sum+@store_sum,addtime=getDate() where store_id=@store_id and member_id=@member_id
return 1
End
ELSE
Begin
select @NowAmount=(select store_sum from ncp_cart WHERE store_id=@store_id and member_id=@member_id)
if @NowAmount>@Amount
return 0
else
INSERT INTO [ncp_cart](store_id,store_sum,member_id) values(@store_id,@store_sum,@member_id)
return 1
END
End
GO

/* type 为1是全部删 0时只删一个 */
CREATE PROCEDURE ncp_Cart_Del
@type int=0,
@store_id int ,
@member_id int
AS
begin
if @type=0
delete from [ncp_cart] where store_id=@store_id and member_id=@member_id
else
delete from [ncp_cart] where member_id=@member_id
End
GO