MYSQL使用左联接选择最新时间戳

如何解决MYSQL使用左联接选择最新时间戳

更新： 我的MysqL版本是5.7.32。

这是我目前的查询，它从LEFT JOIN中全部返回为NULL。

        SELECT %playlists%.*,tracks.*
        FROM %playlists%
        LEFT JOIN (
            SELECT *
            FROM %tracks%
            ORDER BY timestamp DESC
            LIMIT 1
        ) AS tracks ON tracks.id_playlist=%playlists%.id
        WHERE %playlists%.owner='.$id_owner.'
        ORDER BY %playlists%.name ASC

我的桌子是前

%playlist%
name           |id |owner|
relaxing music | 1 | 3   |

%tracks%
id_playlist|timestamp |tracks|
   1       |1234958574| 200
   1       |1293646887| 300

我想将％tracks％的最新输入包含在同一id_playlist中。

原始： 我有一个静态的表，我想使用时间戳从另一个表中加入最新记录。我似乎找不到正确的语法。

     $r_result = sql_special_multi('
        SELECT %playlists%.*,%stats%.track_count AS track_count
        FROM %playlists%
        --- LEFT JOIN %stats% ON %playlists%.id=%stats%.id_playlist (selecting only the column with latest timestamp)
        WHERE %playlists%.owner = '.$id_owner.'
        ORDER BY %playlists%.name ASC
    ');