Firebird，由外键字段组

Question

我有两张桌子：

1. 个人：

   INDEX, NAME, SURNAME
   

2. 活性：

   INDEX, ACTIVITY, PEOPLE_INDEX
   

我想要显示：

select PEOPLE_INDEX, count(INDEX) from ACTIVITY group by PEOPLE_INDEX

但不是'PEOPLE_INDEX'我想从'PEOPLE'表中看到NAME和SURNAME。

我该如何撰写查询？

谢谢！

Answer 1

SELECT P.NAME, P.SURNAME, A.PEOPLE_INDEX, COUNT(A.INDEX) AS Cnt
FROM ACTIVITY A INNER JOIN PEOPLE P
ON A.INDEX = P.INDEX
GROUP BY P.NAME, P.SURNAME, A.PEOPLE_INDEX