JOIN中的MySQL子查询:View的SELECT包含FROM子句中的子查询

时间:2014-08-26 21:26:59

标签: mysql

跟随MySQL视图有问题。 Syntax check说“恭喜!SQL看起来很好”然而,我的MySQL 5.6.20给出了:

ERROR 1349 (HY000): View's SELECT contains a subquery in the FROM clause

这是视图

CREATE OR REPLACE VIEW view_salon_list AS SELECT
    s.id AS salon_id,
    v.name AS salon_name,
    v.street AS salon_street,
    v.photo AS salon_photo,
    m.name AS city_name,
    k.name AS county_name,
    c.avg_rating AS avg_rating,
    c.comment_count AS comment_count
FROM
    salon_version AS v
LEFT JOIN salon AS s ON v.salonid = s.id
LEFT JOIN city AS m ON v.cityid = m.id
LEFT JOIN county AS k ON m.countyid = k.id
LEFT JOIN ( SELECT 
              vc.salon_id AS salon_id,
              AVG(vc.rating_value) AS avg_rating,
              COUNT(vc.salon_id) AS comment_count
            FROM 
              view_comment_stats AS vc 
            GROUP BY
              vc.salon_id 
           ) AS c ON c.salon_id = s.id;

更新

与“重复帖子”混淆可能我是盲人,但我在FROM子句中没有子查询,因为它在帖子中标记为我的问题的答案。我只在JOIN子句中有子查询,根据这篇文章的回答Selecting multiple columns/fields in MySQL subquery,它应该是可能的。

0 个答案:

没有答案
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