使用两个不同表的多个mysql查询

Question

我在写一个查询时遇到问题。我有两张表，我想从销售和电话中获取数据。在两个表格中都有一个记录电话号码的栏以及一个日期栏。我可以加入JOIN以匹配销售电话，但是我也想显示两个表中不匹配的条目。基本上在单个页面上显示与两个表匹配的行，然后分别与每个表不匹配的行。

下面是连接查询：

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，尽量使用<>操盘=显示不匹配结果

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为？

试试这个代码

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不支持全连接，你需要离开结合，并与工会

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