银行数据库架构:
account (account_number, branch_name, balance)
branch (branch_name, branch_city, assets)
customer (customer_name customer_street, customer_city)
loan (loan_number, branch_name, amount)
deposito (customer_name, account_number)
borrower (customer_name, loan_number)
我怎么知道借款人的账号？
mysql ×1