mysql - 从单行中选择重复项？

Question

这里我有一个名为 CoreTracks 的表:

+---------+-----------------+----------+----------+----------+---------+
| TrackId |       URI       | ArtistID |  Title   | FileSize | BitRate |
+---------+-----------------+----------+----------+----------+---------+
|  1      | /home/music/... |   234    | atune    |  8958223 |   192   |
|  2      | /home/music/... |   427    | goodsong |  6954373 |   192   |
|  3      | /home/music/... |   427    | goodsong |  4695698 |   128   |
|  4      | /home/music/... |   427    | goodsong |  5839962 |   160   |
|  5      | /home/music/... |   427    | goodsong |  4695698 |   128   |
|  6      | /home/music/... |   522    | another  |  3458859 |   128   |
+---------+-----------------+----------+----------+----------+---------+

我想要检索的是:

+---------+-----------------+----------+----------+----------+---------+
| TrackId |       URI       | ArtistID |  Title   | FileSize | BitRate |
+---------+-----------------+----------+----------+----------+---------+
|  3      | /home/music/... |   427    | goodsong |  4695698 |   128   |
|  4      | /home/music/... |   427    | goodsong |  5839962 |   160   |
|  5      | /home/music/... |   427    | goodsong |  4695698 |   128   |
+---------+-----------------+----------+----------+----------+---------+

我尝试根据具有相同的标题、相同的艺术家 ID 和不同的轨道 ID 来删除重复项，同时不返回具有最高比特率和最大文件大小的条目。

到目前为止我所拥有的是:

SELECT * FROM CoreTracks 
WHERE Title = Title AND ArtistID = ArtistID 
AND BitRate != (SELECT MAX(BitRate) FROM CoreTracks WHERE Title = Title AND ArtistID = ArtistID) 
AND FileSize != (SELECT MAX(FileSize) FROM CoreTracks WHERE Title = Title AND ArtistID = ArtistID);

返回每个轨道。为了让这个查询工作，我缺少什么？

Answer 1

这将得到相反的结果(即跳过重复项):

SELECT c1.*
  FROM CoreTracks c1
      ,(SELECT Title, ArtistID, MAX(FileSize) AS maxFileSize, MAX(BitRate) maxBitRate
          FROM CoreTracks
          GROUP BY Title, ArtistID) c2
  WHERE c1.Title = c2.Title
    AND c1.ArtistID = c2.ArtistID
    AND (c1.FileSize = c2.maxFileSize OR c1.BitRate = c2.maxBitRate)

以及重复项:

SELECT c1.*
  FROM CoreTracks c1
      ,(SELECT Title, ArtistID, MAX(FileSize) AS maxFileSize, MAX(BitRate) maxBitRate
          FROM CoreTracks
          GROUP BY Title, ArtistID) c2
  WHERE c1.Title = c2.Title
    AND c1.ArtistID = c2.ArtistID
    AND (c1.FileSize != c2.maxFileSize AND c1.BitRate != c2.maxBitRate)