尋找處理最多客戶的代表

Question

我正在嘗試列出處理最多客戶的代表。

SELECT RTRIM(S.REP_FNAME) + ' ' + S.REP_LNAME AS [Representative], COUNT(C.REP_NUM) AS Customer(s) Per Rep]
FROM CUSTOMER C, SALESREP S 
WHERE S.REP_NUM = C.REP_NUM
GROUP BY RTRIM(S.REP_FNAME) + ' ' + S.REP_LNAME 

我的查詢返回：

每個代表的代表客戶
胡安·佩雷斯3
理查德·赫爾4
瓦萊麗·凱澤4

注意*理查德和瓦萊麗是我想要的。 它應該顯示為兩個記錄

如果您需要更多詳細信息，請告訴我。

Answer 1

 SELECT RTRIM(S.REP_FNAME) + ' ' + S.REP_LNAME AS [Representative], COUNT(C.REP_NUM) AS [Customer(s) Per Rep]
 FROM CUSTOMER C
 JOIN SALESREP S 
   ON S.REP_NUM = C.REP_NUM
 GROUP BY RTRIM(S.REP_FNAME) + ' ' + S.REP_LNAME 
 HAVING COUNT(*) = (SELECT COUNTS FROM (SELECT TOP(1) REP_NUM, COUNT(REP_NUM) AS COUNTS GROUP BY REP_NUM ORDER BY COUNT(REP_NUM) DESC ))

或者您可以使用您給它的名稱。：

ORDER BY [Customer(s) Per Rep] DESC

或者使用不太復雜的方法：

SELECT TOP(1) RTRIM(S.REP_FNAME) + ' ' + S.REP_LNAME AS [Representative], COUNT(C.REP_NUM) AS [Customer(s) Per    Rep]
FROM CUSTOMER C, SALESREP S 
WHERE S.REP_NUM = C.REP_NUM
GROUP BY RTRIM(S.REP_FNAME) + ' ' + S.REP_LNAME 
ORDER BY [Customer(s) Per Rep] DESC