从不同的表中计算特定值的行两个表都包含一个相同的列？

Question

Account(Acc_no, branch_name,balance)
Depositor(cust_name,Acc_no)

找不到。每个分支机构的存款人？

Answer 1

SELECT A.branch_name, COUNT(D.cust_name) FROM Account A INNER JOIN Depositor D GROUP BY A.branch_name

希望这有帮助

Answer 2

选择ACCOUNT.BRANCH_NAME，COUNT（DEPOSITOR.CUST_NAME）来自ACCOUNT INNER JOIN存款人帐户.ACC_NO = DEPOSITOR.ACC_NO GROUP BY BRANCH_NAME;