SQL将2个查询合并为1

Question

这是我的问题，我试图找到销售额最高的州中销售额最高的员工。我已经编写了单独的查询来首先查找销售额最高的州，然后查找该州销售额最高的员工。

我的问题是我只能有一个查询，所以我必须结合这两个使用JOIN或子查询，但我无法这样做，因为我的第一个查询返回2个单独的列。我该如何结合这些查询？

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

应该是这个

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