drtkyykai004574380 2013-12-21 06:49
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如何为“你可能知道的人”构建查询[关闭]

i need to show "people you may know" based on the current friends of a user and the friend suggestion should consider blocked users,if user A blocked user B,A should not see user B or vice versa in their friends Suggestions here is my table structure

mnc_users

id  |   username    |   email       |   fullname
---------------------------------------------------
1   |   userA       |   usera@in.in |   User Alpha
2   |   userB       |   userb@in.in |   User Bravo
3   |   userC       |   userc@im.in |   user c
4   |   userd       |   userd@am.in |   user del

mnc_friends

uid |   fid |   time
-------------------------
1   |   3   |   1363859398  
3   |   1   |   1363859398  
4   |   1   |   1368854898  
1   |   4   |   1368854898  
3   |   2   |   1363846116  
2   |   3   |   1363846116  
2   |   4   |   1363846116  
4   |   3   |   1363846116  

mnc_blocked

id  |   uid |   bid
--------------------
1   |   1   |   2

mnc_frnd_rqsts

uid |   fid
-----------
5   |    1

how can i display users suggestions in this case using php and mysql?

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2条回答 默认 最新

  • drkwpgrdb092239314 2013-12-21 09:57
    关注

    if u edit this answer to add couple of things you will get it working

    $user_id = 1;
    
        $sql = "    SELECT * FROM mnc_users WHERE id NOT IN(
                                                 SELECT fid FROM mnc_friends WHERE uid='$user_id' AND fid!='$user_id'
                                                )
                                          AND id NOT IN(
                                                SELECT bid FROM mnc_blocked WHERE uid='$user_id'
                                               )
    AND id NOT IN(
                               SELECT fid FROM mnc_frnd_rqsts WHERE uid='$user_id'
                                               )
           ";
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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