I have small knowledge in databases.
bank accouts are in detabase. so get or put money from account (ATM/PC) mean edit of this database.
when this happen,
first it must be opend, then modify it, verify it and finally it must be closed to changes take effect.
when it is open state, others can't access it.
if PC (@bank) being accessed, ATM will wait until bank PC close the database field. (account)
bank accouts are in detabase. so get or put money from account (ATM/PC) mean edit of this database.
when this happen,
first it must be opend, then modify it, verify it and finally it must be closed to changes take effect.
when it is open state, others can't access it.
if PC (@bank) being accessed, ATM will wait until bank PC close the database field. (account)

Api Koned Bandala naha 


