高手帮忙写个银行转帐事务.

[dengyi425]

帮我写一个银行转帐的事务.也就是把一个用户的钱转入另一个用户.同时成功,同时失败.

[dawugui]

commit
rollback

[dengyi425]

commit
rollback
我知道啊. 但具体代码怎么写啊我忘记了!

[fa_ge]

这种工作，很有兴趣

[tengyue_PC]

create trigger trig_trans
on transInfo
for insert
as
declare @transMoney money,@transType char(10),@cardID varchar(20),@balance money
select @transMoney=transMoney,@transType=transType,@cardID=cardID
from inserted
select @balance=balance from cardInfo where @cardID=cardID
if(@transType='支取')
begin
if @balance<=@transMoney
begin
raiserror('交易失败！余额不足!',16,1)
rollback tran
end
else
begin
update cardInfo set balance=balance-@transMoney
where cardID=@cardID
select @balance=balance from cardInfo where cardID=@cardID
print '交易成功!余额为'+ cast (@balance as varchar(10))+'RMB'
end
end
else
begin
update cardInfo set balance=balance+@transMoney
where cardID=@cardID
select @balance=balance from cardInfo where cardID=@cardID
print '交易成功!余额为'+ cast (@balance as varchar(10))+'RMB'
end

[fwacky]

帮定！