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create procedure TransferMoeny
(
@fromAccountNo varchar(50),-- ת³öÕ˺Å
@ToAccountNo varchar(50),--תÈëÕ˺Å
@MoneyCount money--תÕ˽ð¶î
)
as
--ÅжÏÕ˺ÅÊÇ·ñ´æÔÚ
if exists (select 1 from ÕÊ»§±í where Õ˺Š= @fromAccountNo)
begin
if exists (select 1 from ÕÊ»§±í where Õ˺Š= @ToAccountNo)
begin
--ÅжÏת³ö½ð¶îÊÇ·ñ´óÓÚµ±Ç°Óà¶î
if (select µ±Ç°Óà¶î from ÕÊ»§±í where Õ˺Š= @fromAccountNo) >= @MoneyCount
begin
--¿ªÊ¼×ªÕË
begin transaction
insert into [´æÈ¡¼Ç¼±í] ([Õ˺Å],[´æÈ¡ÀàÐÍ], [´æÈ¡½ð¶î]) values(@fromAccountNo, -1,@MoneyCount)
if @@error <> 0
begin
rollback transaction--·¢Éú´íÎóÔò»Ø¹öÊÂÎñ£¬ÎÞÌõ¼þÍ˳öl
return
end
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