使用連接在MySQL

Question

我有這個疑問，其完美的作品：

SELECT * 
FROM Customer 
WHERE SacCode IN 
(
    SELECT SacCode 
    FROM SacCode 
    WHERE ResellerCorporateID = 392 
    ORDER BY SacCode 
) 
AND CustomerID IN 
(
    SELECT CxID 
    FROM CustAppointments 
    WHERE AppRoomID IN 
    (
     SELECT AppRoomID 
     FROM ClinicRooms 
     WHERE ClinID IN 
     (
       SELECT ClinID 
       FROM AppClinics 
       WHERE ClinDate >='20090101' 
       AND ClinDate <='20091119' 
     ) 
    ) 
) 

不過，我需要看到ClinDate的值（最後一個嵌套查詢內），所以我已經告訴我需要返工使用連接查詢。

我不知道怎麼樣，有人可以幫忙嗎？

謝謝。

Answer 1

這裏是一個開始：

SELECT  * 
FROM  Customer c 
INNER JOIN CustAppointments ca ON ca.CxId = c.CustomerID 
INNER JOIN ClinicRooms cr ON cr.AppRoomID = ca.AppRoomID 
INNER JOIN AppClinics ac ON ac.ClinID = cr.ClinID 
WHERE  ap.ClinDate BETWEEN '20090101' AND '20091119' 
AND  SacCode IN (SELECT sc.SacCode 
         FROM SacCode sc 
         WHERE sc.ResellerCorporateID = 392) 

這將允許您從AppClinics選擇列。

Answer 2

閱讀本http://www.w3schools.com/Sql/sql_join.asp