Question

我有一个问题：

SELECT b.user_id FROM users b where b.ratings_count !=      
    (SELECT COUNT(*) FROM
      ( SELECT wi.id FROM winelist_items wi
        JOIN wine_rated wr
        ON rate_user_id = b.user_id
        AND rate_vintage_id = wi.vintage_id
        AND wi.winelist_id = (SELECT id FROM winelist w
        WHERE w.user_id = b.user_id LIMIT 1 )
        AND wi.vintage_id !=0
      )t 
    ) limit 10;

必须从与计算的列中的列中具有不同ratings_count的用户中选择所有user_id 通过sql。但问题是我收到了错误消息＆＃39;错误代码：1054。未知栏＆＃39; b_user_id＆＃39;在＆＃39; on条款＆＃39; ＆＃39 ;.我是什么做错了？非常感谢您的帮助。

Answer 1

尝试这个

 SELECT b.user_id,
     (SELECT count(wi.id)
          FROM wine_rated wr
          JOIN winelist_items wi ON wr.rate_vintage_id = wi.vintage_id
          WHERE wr.rate_user_id = b.user_id  
          AND wi.winelist_id =
              (SELECT id
               FROM winelist w
               WHERE w.user_id = wi.rate_user_id LIMIT 1)
          AND wi.vintage_id !=0 ) AS CNT
FROM users b
GROUP BY b.user_id HAVING b.ratings_count !=CNT LIMIT 10;

使用子查询选择的上表可见性

1 个答案: