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create procedure TransferMoeny
(
    @fromAccountNo varchar(50),-- ×ª³öÕ˺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
                   &nbs


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