使用加入距離搜索和mysql

Question

在mysql中我計算兩個郵政編碼之間的所有點，這對我來說工作得很好。現在我想更新該查詢來加入一個額外的表格，但我收到一個錯誤。下面是查詢請看看：

SELECT * 
FROM users 
INNER JOIN 
    (SELECT *, 
      ACOS(
        COS(RADIANS(30.7261629)) 
       * COS(RADIANS(lat_collection)) 
       * COS(RADIANS(76.7596221) - RADIANS(`long_collection`)) 
       + SIN(RADIANS(30.7261629)) 
       * SIN(RADIANS(lat_collection)) 
      ) * 3956 AS `distance` 
    FROM quote q 
    WHERE lat_collection BETWEEN 30.7261629 - (30/69) AND 30.3345816 + (30/69) 
    AND `long_collection` BETWEEN 76.7596221 - (30/(69 * COS(RADIANS(30.7261629)))) AND 78.0537813 + (30/(69* COS(RADIANS(30.7261629)))) 
    ) AS u 
ON q.user_id=u.id 
WHERE `distance` < 30 

我需要在同一個查詢中加入四五表;我怎樣才能做到這一點？嘗試加入表格時出現錯誤（我有兩個郵政編碼，然後計算兩個郵政編碼的長度）。

Answer 1

SELECT * 
    FROM users inner join (
    SELECT *, 3956 * ACOS(COS(RADIANS(30.7261629)) * COS(RADIANS(lat_collection)) * COS(RADIANS(76.7596221) - 
    RADIANS(`long_collection`)) 
     + SIN(RADIANS(30.7261629)) * SIN(RADIANS(lat_collection))) AS `distance` 
    FROM quote q 
    WHERE lat_collection BETWEEN 30.7261629 - (30/69) AND 30.3345816 + (30/69) 
    AND `long_collection` BETWEEN 76.7596221 - (30/(69 * COS(RADIANS(30.7261629)))) AND 78.0537813 + (30/(69* COS(RADIANS(30.7261629)))) 
    ) as u on users.id=u.user_id 
    WHERE (3956 * ACOS(COS(RADIANS(30.7261629)) * COS(RADIANS(lat_collection)) * COS(RADIANS(76.7596221) - RADIANS(`long_collection`)) 
     + SIN(RADIANS(30.7261629)) * SIN(RADIANS(lat_collection)))) < 30 

Answer 2

您使用在條件..這是不允許的，你必須重用的完整代碼，而不是別名

SELECT * 
    FROM users inner join (
    SELECT *, 3956 * ACOS(COS(RADIANS(30.7261629)) * COS(RADIANS(lat_collection)) * COS(RADIANS(76.7596221) - 
    RADIANS(`long_collection`)) 
     + SIN(RADIANS(30.7261629)) * SIN(RADIANS(lat_collection))) AS `distance` 
    FROM quote q 
    WHERE lat_collection BETWEEN 30.7261629 - (30/69) AND 30.3345816 + (30/69) 
    AND `long_collection` BETWEEN 76.7596221 - (30/(69 * COS(RADIANS(30.7261629)))) AND 78.0537813 + (30/(69* COS(RADIANS(30.7261629)))) 
    ) as u on users.id=u.user_id 
    WHERE (3956 * ACOS(COS(RADIANS(30.7261629)) * COS(RADIANS(lat_collection)) * COS(RADIANS(76.7596221) - RADIANS(`long_collection`)) 
     + SIN(RADIANS(30.7261629)) * SIN(RADIANS(lat_collection)))) < 30