Sql Server使用事務實現--轉賬問題
阿新 • • 發佈：2019-01-05
create table Bank
(
Cid char(4) primary key,
balance money
)
alter table Bank
add constraint CH_balance check (balance>=10)
insert into Bank values('0001',1000)
insert into Bank values('0002',10)
update Bank set balance=balance-1000 where Cid='0001'
update Bank set balance=balance+1000 where Cid='0002'
begin tran
begin try
declare @errorsum int=0
update Bank set balance=balance-900 where Cid='0001'
set @[email protected][email protected]@error
update Bank set balance=balance+900 where Cid='0002'
set @[email protected][email protected]@error
commit
print '提交！！'
end try
begin catch
rollback
print '回滾！'
(
Cid char(4) primary key,
balance money
)
alter table Bank
add constraint CH_balance check (balance>=10)
insert into Bank values('0001',1000)
insert into Bank values('0002',10)
update Bank set balance=balance-1000 where Cid='0001'
update Bank set balance=balance+1000 where Cid='0002'
begin tran
begin try
declare @errorsum int=0
update Bank set balance=balance-900 where Cid='0001'
set @[email protected][email protected]@error
update Bank set balance=balance+900 where Cid='0002'
set @[email protected][email protected]@error
commit
print '提交！！'
end try
begin catch
rollback
print '回滾！'
end catch
開啟"隱式事務":set
implicit_Transactions on
關閉“隱式事務”:set implicit_Transactions off