In a database system,within a banking system application,transaction between A is transferring 1000 from Acc1 to account Acc2 at the same time,transaction B is processing every records and adding interest payment by increasing each balance by 1.5 percent initially Acc1 has a balance of 4000 and Acc2 hasa balance of 5000,read Acc1 record and lock, reduce the balance by 1000,write balance, release lock.
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