即以游客身份登錄網(wǎng)站時以cookie的方式存儲購物車，而以登錄用戶的身份進入時將購物車信息存儲到數(shù)據(jù)庫中去，若是先以游客身份完成購物再登錄繼續(xù)購物，則將cookies購物車存入數(shù)據(jù)庫；
其中涉及到的存儲過程主要如下：
一：已登錄會員添加商品到購物車功能：

復(fù)制代碼代碼如下:

 
/* @store_sum表示要添加的商品數(shù)量,添加同時確認購物車中自己已有的數(shù)量與將要加入的數(shù)量之和是否超過庫存 */ 
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 

二：購物車的刪除功能

復(fù)制代碼代碼如下:

 
/* type 為1是全部刪 0時只刪一個 */ 
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 