别名子查询不起作用

Question

我有以下代码：

SELECT
CU.customer_ID AS "Customer ID",
CU.cust_LNAME AS "Last Name",
CU.cust_FNAME AS "First Name",
RH.movie_ID AS "Movie ID",
MO.movie_title AS "Movie Title",
MO.release_year AS "Release Year",
(
SELECT COUNT(*) FROM RentalHistory RH2 WHERE RH2.movie_ID = RH.movie_ID AND RH2.customer_ID = RH.customer_ID HAVING COUNT(*) > 1
) "Nbr. Of Times Rented"
FROM Customer CU
RIGHT JOIN Rentalhistory RH ON (RH.customer_ID = CU.customer_ID)
INNER JOIN Movie MO ON (MO.movie_ID = RH.movie_ID)
GROUP BY CU.customer_ID, RH.movie_ID    
HAVING "Nbr. Of Times Rented" > 1
ORDER BY CU.cust_LNAME ASC, CU.cust_FNAME ASC;

我一直在获取别名子查询的无效标识符？关于我做错了什么的想法？

Answer 1

我认为你不需要子查询。这样做你想要的吗？

SELECT CU.customer_ID AS "Customer ID",
       CU.cust_LNAME AS "Last Name",
       CU.cust_FNAME AS "First Name",
       RH.movie_ID AS "Movie ID",
       MO.movie_title AS "Movie Title",
       MO.release_year AS "Release Year",
       COUNT(*) as "Nbr. Of Times Rented"
FROM Customer CU RIGHT JOIN
     Rentalhistory RH
     ON RH.customer_ID = CU.customer_ID INNER JOIN
     Movie MO
     ON MO.movie_ID = RH.movie_ID
GROUP BY CU.customer_ID, RH.movie_ID    
HAVING count(*) > 1
ORDER BY CU.cust_LNAME ASC, CU.cust_FNAME ASC;