即以游客身份登录网站时以cookie的方式存储购物车，而以登录用户的身份进入时将购物车信息存储到数据库中去，若是先以游客身份完成购物再登录继续购物，则将cookies购物车存入数据库；
其中涉及到的存储过程主要如下：
一：已登录会员添加商品到购物车功能：
复制代码 代码如下:
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
二：购物车的删除功能
复制代码 代码如下:
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
