使用兩個不同表的多個mysql查詢

Question

我在寫一個查詢時遇到問題。我有兩張表，我想從銷售和電話中獲取數據。在兩個表格中都有一個記錄電話號碼的欄以及一個日期欄。我可以加入JOIN以匹配銷售電話，但是我也想顯示兩個表中不匹配的條目。基本上在單個頁面上顯示與兩個表匹配的行，然後分別與每個表不匹配的行。

下面是連接查詢：

SELECT 
    sales.*, 
    calls.* 
FROM `sales` 
JOIN `calls` 
    ON sales.TelephoneNo = calls.TelephoneNo 
WHERE (
     sales.OrderDate >= '$MyStartDATE' 
    AND sales.OrderDate <= '$MyEndDATE' 
) AND (
     calls.CallDate >= '$MyStartDATE' 
    AND calls.CallDate <= '$MyEndDATE' 
) ORDER BY sales.OrderDate 

Answer 1

好，儘量使用<>操盤=顯示不匹配結果

SELECT 
    sales.*, 
    calls.* 
FROM `sales` 
JOIN `calls` 
    ON sales.TelephoneNo <> calls.TelephoneNo 
WHERE (
     sales.OrderDate >= '$MyStartDATE' 
    AND sales.OrderDate <= '$MyEndDATE' 
) AND (
     calls.CallDate >= '$MyStartDATE' 
    AND calls.CallDate <= '$MyEndDATE' 
) ORDER BY sales.OrderDate 

UPDATE

如果您使用左加入而不是加入它有所作爲？

試試這個代碼

SELECT sales.*, 
     calls.* 
FROM `sales` 
     LEFT JOIN `calls` 
       ON sales.telephoneno <> calls.telephoneno 
WHERE sales.orderdate >= '$MyStartDATE' 
     AND sales.orderdate <= '$MyEndDATE' 
     AND calls.calldate >= '$MyStartDATE' 
     AND calls.calldate <= '$MyEndDATE' 
ORDER BY sales.orderdate 

Answer 2

MySQL不支持全連接，你需要離開結合，並與工會

SELECT 
    s.OrderDate, 
    PhoneNumber, 
    s.something fake, 
    IF(c.PhoneNumber IS NULL, 'Sales', 'Both') match_from, 
    IF(c.PhoneNumber IS NULL, 0, 1) has_match 
FROM 
    sales s 
LEFT JOIN 
    calls c 
    USING (PhoneNumber) 
WHERE 
    s.OrderDate BETWEEN '$MyStartDATE' AND '$MyEndDATE' 
UNION DISTINCT 
SELECT 
    c1.CallDate, 
    PhoneNumber, 
    'fake', 
    IF(s1.PhoneNumber IS NULL, 'Call', 'Both'), 
    IF(s1.PhoneNumber IS NULL, 0, 1) 
FROM 
    sales s1 
RIGHT JOIN 
    calls c1 
    USING (PhoneNumber) 
WHERE 
    c1.CallDate BETWEEN '$MyStartDATE' AND '$MyEndDATE' 
ORDER BY has_match