SQL將2個查詢合併爲1

Question

這是我的問題，我試圖找到銷售額最高的州中銷售額最高的員工。我已經編寫了單獨的查詢來首先查找銷售額最高的州，然後查找該州銷售額最高的員工。

我的問題是我只能有一個查詢，所以我必須結合這兩個使用JOIN或子查詢，但我無法這樣做，因爲我的第一個查詢返回2個單獨的列。我該如何結合這些查詢？

SELECT  TOP 1 
      StateProvince AS "Most Popular State", 
      COUNT (*) AS "Number Sold" 
FROM  CUSTOMER JOIN INVOICE ON CustomerID = FK_CustomerID 

GROUP BY StateProvince 
ORDER BY "Number Sold" DESC 



SELECT  TOP 1 
      EMPLOYEE.Name, 
      EmpID, 
      COUNT(InvoiceNbr) AS "Number Sold" 
FROM  EMPLOYEE JOIN INVOICE ON EmpID = FK_EmpID 
JOIN  CUSTOMER ON FK_CustomerID = CustomerID 
WHERE  StateProvince = --Most popular state found in 1st query 
GROUP BY EMPLOYEE.Name, EmpID 
ORDER BY "Number Sold" DESC 

Answer 1

應該是這個

SELECT  TOP 1 
      EMPLOYEE.Name, 
      EmpID, 
      COUNT(InvoiceNbr) AS "Number Sold By EMP", 
      StateProvince AS "Most Popular State", 
      COUNT (*) AS "Number Sold For STATE" 
FROM  EMPLOYEE JOIN INVOICE ON EmpID = FK_EmpID 
JOIN  CUSTOMER ON FK_CustomerID = CustomerID 
GROUP BY EMPLOYEE.Name, EmpID 
ORDER BY "Number Sold By EMP" DESC