SQL INNER JOINing 2 子查询

我试图将这两个子查询（我认为这就是它的名字）内部联接在一起，其中第一个查询的branchName等于第二个查询的branchName。

然而，他们似乎并不想联合起来，而且以我有限的 SQL 知识，我似乎找不到解决这个问题的方法。我尝试将括号移动到各种位置，但它也不喜欢这样。

SELECT * 
FROM
(
SELECT B.branchName, A.type, AVG (T.amount), COUNT(A.accNumber)
FROM Branch B, Account A, Transactions T
WHERE 
    B.branchNumber = A.branchNumber AND
    A.accNumber = T.accNumber
GROUP BY B.branchName, A.type
)

INNER JOIN

(
SELECT B1.branchName, COUNT(A1.accNumber)
FROM Account A1, Branch B1
WHERE 
      A1.branchNumber = B1.branchNumber 
GROUP BY B1.branchName
HAVING COUNT(A1.accNumber) > 5
)
ON
 B.branchName = B1.branchName

为了使查询工作，您需要命名内部选择（子查询）：

SELECT * 
FROM
(
SELECT B.branchName, A.type, AVG (T.amount), COUNT(A.accNumber)
FROM Branch B, Account A, Transactions T
WHERE 
    B.branchNumber = A.branchNumber AND
    A.accNumber = T.accNumber
GROUP BY B.branchName, A.type
) q1

INNER JOIN

(
SELECT B1.branchName, COUNT(A1.accNumber)
FROM Account A1, Branch B1
WHERE 
      A1.branchNumber = B1.branchNumber 
GROUP BY B1.branchName
HAVING COUNT(A1.accNumber) > 5
) q2
ON
 q1.branchName = q2.branchName