無法在HAVING子句中添加條件以進行查詢

Question

我的數據庫中有位於16英里的Blocks Realty記錄。

SELECT x.companyname, x.distance, y.city, y.zip 
FROM (SELECT userid, companyname, lat, lng, 
(3959 * acos(cos(radians(42.323617)) * 
cos(radians(lat)) * cos(radians(lng) - radians(-83.200811)) + 
sin(radians(42.323617)) * sin(radians(lat)))) AS distance 
FROM users 
WHERE (usertype = 2 OR usertype = 3) 
HAVING distance < 25 
order by distance) x 
INNER JOIN 
(select * from users where find_in_set('Real Estate',profession) <> 0) y 
ON x.userid = y.userid 

當我更新下面的查詢新增的城市或拉鍊狀況，減少距離搜索範圍，我得到的錯誤＃1054 - 未知列「城市」「having子句」中。我該如何糾正？

SELECT x.companyname, x.distance, y.city, y.zip 
FROM (SELECT userid, companyname, lat, lng, 
(3959 * acos(...) AS distance 
FROM users 
WHERE (usertype = 2 OR usertype = 3) 
HAVING distance < 11 
AND (city = 'Detroit' OR zip = '48221') 
order by distance) x 
INNER JOIN 
(select * from users where find_in_set('Real Estate',profession) <> 0) y 
ON x.userid = y.userid 

Answer 1

移動這些條件的where條款：

SELECT x.companyname, x.distance, y.city, y.zip 
FROM (SELECT userid, companyname, lat, lng, 
      (3959 * acos(...) AS distance 
     FROM users 
     WHERE usertype IN (2, 3) AND 
      (city = 'Detroit' OR zip = '48221') 
     HAVING distance < 11 
     order by distance 
    ) x INNER JOIN 
    (select * from users where find_in_set('Real Estate',profession) <> 0) y 
    ON x.userid = y.userid; 

編輯：

的原因，你的原始版本沒有工作是因爲having條款需要參照中定義的列別名select。所以，你也可以這樣做：

SELECT x.companyname, x.distance, y.city, y.zip 
FROM (SELECT userid, companyname, lat, lng, city, zip 
      (3959 * acos(...) AS distance 
     FROM users 
     WHERE usertype IN (2, 3)     
     HAVING distance < 11 OR (city = 'Detroit' OR zip = '48221') 
     order by distance 
    ) x INNER JOIN 
    (select * from users where find_in_set('Real Estate',profession) <> 0) y 
    ON x.userid = y.userid;