BRANCH (branch#, name, address, manager)
CUSTOMER (customer#, name, address, dob)
IDDocument (Document#, customer#)
ACCOUNT (account#, balance, type, open_date, branch#, customer#)
TELLER (teller#, name, address, dob, salary_level)
TELLER_BRANCH (teller#, assign_date, branch#)
ACCOUNT_TRANSACTION (account#, transaction_date, teller#)
