php - 如何为 "People You May Know"构建查询

Question

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Answer 1

如果你编辑this answer添加一些东西你就会让它工作

$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'
                                           )
       ";