触发器的使用
ALTER TRIGGER [dbo].[IsFull] ON [dbo].[BorrowBid]
FOR UPDATE
AS
declare @AlsoNeedAmount decimal(18,2)
declare @GurantFlag int
declare @AlsoNeedGurantAmount decimal(18,2)
select @AlsoNeedAmount=AlsoNeedAmount,@GurantFlag=GurantFlag,@AlsoNeedGurantAmount=AlsoNeedGurantAmount from BorrowBid where BorrowBidID=(select BorrowBidID from inserted)
if(@GurantFlag=1)--担保标
begin
if(@AlsoNeedAmount=0 and @AlsoNeedGurantAmount=0)
update BorrowBid set FullFlag=1 where BorrowBidID=(select BorrowBidID from inserted)
end
else--非担保标
begin
if(@AlsoNeedAmount=0)
update BorrowBid set FullFlag=1 where BorrowBidID=(select BorrowBidID from inserted)
end
--inserted,deleted是在触发器中使用的两个临时表,
--当执行insert操作时,在inserted中存储着当前插入的记录,
在执行delete操作时,在deleted中存储着当前删除的记录,
当执行update时,在inserted中存储着修改后的记录,在deleted中存储着修改前的记录。