php - MySql Subquery IN 返回第一个结果，而不是所有结果

Question

我有以下查询:

SELECT TrackID, Name, Artist, Album, TotalTime, TrackNumber, TrackCount
FROM tracks
WHERE TrackID IN (SELECT Tracks FROM playlists
                  WHERE ID='f8ad830c-e2d6-11e1-99d7-00132094'
                  LIMIT 1)
ORDER BY Artist, Album, TrackNumber

执行返回“tracks”表中的第一行，以包含从子查询返回的任何结果。截至目前，子查询返回:

41646,41696,41698,41700,41702,41704,41706,41708,41710,41712

当我将从子查询返回的上述值放入原始查询中(代替子查询)时，它会返回我期望的所有行。

为什么子查询将返回的结果限制为第一个结果，但用返回的结果替换子查询(在 PHPMyAdmin 中运行时)会返回所有结果？

Answer 1

SELECT TrackID, Name, Artist, Album, TotalTime, TrackNumber, TrackCount 
  FROM tracks 
 WHERE FIND_IN_SET(TrackID
                  , (SELECT Tracks
                       FROM playlists 
                      WHERE ID='f8ad830c-e2d6-11e1-99d7-00132094' 
                      LIMIT 1
                    )
                  ) > 0
 ORDER BY Artist, Album, TrackNumber 
;