我正在开发一个与facebook集成的应用程序。该应用程序可以作为标签应用程序嵌入到FB页面中。在多个表中按ID分组的Mysql计数记录
使用FB SDK feed的页面将被存储在Feed表中。
页面粉丝可能会喜欢并评论按页面发布的Feed。 用户评论专卖店喜欢在像表和用户存储在评论表
我想总数(喜欢数+评论数)的每一个用户。
SQL小提琴:http://sqlfiddle.com/#!2/ecb37/10/0
表:订阅
| ID | POST_ID |
|----|---------------------------------|
| 56 | 150348635024244_795407097185058 |
| 55 | 150348635024244_795410940518007 |
| 54 | 150348635024244_795414953850939 |
| 53 | 150348635024244_797424133650021 |
| 52 | 150348635024244_797455793646855 |
| 51 | 150348635024244_798997120159389 |
| 50 | 150348635024244_798997946825973 |
表:喜欢
SELECT user_id, COUNT(*) FROM likes GROUP by user_id
| USER_ID | LIKECOUNT |
|------------------|-----------|
| 913403225356462 | 4 |
| 150348635024244 | 3 |
| 356139014550882 | 2 |
| 753274941400012 | 2 |
| 1559751687580867 | 1 |
表:评论
SELECT user_id, COUNT(*) FROM comments GROUP by user_id
| USER_ID | COMMENTSCOUNT |
|-----------------|---------------|
| 150348635024244 | 2 |
| 356139014550882 | 2 |
| 913403225356462 | 2 |
结果应该是这样的
| POINTS | LIKESCOUNT | COMMENTSCOUNT | USER_ID |
|--------|------------|---------------|-----------------|
| 6 | 4 | 2 | 913403225356462 |
| 5 | 3 | 2 | 150348635024244 |
| 4 | 2 | 2 | 356139014550882 |
| 2 | 2 | 0 | 753274941400012 |
| 1 | 1 | 0 |1559751687580867 |
我尝试此查询。但每个用户的数量是错误的
SELECT COUNT(likes.user_id)+COUNT(comments.user_id) as points, likes.user_id FROM `likes`
LEFT JOIN comments ON likes.user_id = comments.user_id
LEFT JOIN feeds ON likes.post_id = feeds.post_id
WHERE likes.post_id LIKE '153548635024244%'
GROUP BY likes.user_id
ORDER BY points DESC
+1这是工作 – 2014-09-30 03:28:48