在HAVING子句中添加条件以进行查询时遇到问题

Question

我的数据库中有一个位于16英里处的Block Realty记录。

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

当我更新下面的查询以添加城市或邮编条件并减少距离搜索范围时，我收到错误＃1054 - 未知列＆＃39;城市＆＃39;在＆＃39;有条款＆＃39; 。我该如何纠正？

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

将这些条件移至where子句：

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;

编辑：

原始版本无法正常工作的原因是having子句需要引用select中定义的列别名。所以，你也可以这样做：

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;