@orderid nvarchar(50),--訂單號
@userid int,--使用者編號
@address nvarchar(255),--收貨人位址
@totalmoney money output --總金額
asbegin
declare @error int
set @error=0
--計算總金額
begin transaction
select @totalmoney=sum(unitprice*[count]) from books inner join cart on
books.id=cart.bookid where cart.userid=@userid
set @error=@@error+@error
--向訂單主表中插入資料.
insert into dbo.orders(orderid, orderdate, userid, totalprice, postaddress, state) values(@orderid,getdate(),@userid,@totalmoney,@address,0)
set @error=@@error+@error
--向明細表中插入資料
insert into dbo.orderbook(orderid, bookid, quantity, unitprice)select @orderid,bookid,[count],unitprice from books inner join cart on
books.id=cart.bookid where cart.userid=@userid
set @error=@@error+@error
--刪除購物車表中當前使用者的資料
delete from cart where userid=@userid
set @error=@@error+@error
if @error>0
begin
rollback transaction
endelse
begin
commit transaction
endend
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