-- 查看需要爬取的音乐的分布
 SELECT cast( format( t_tmp.song_id / 10000000, 0) * 10000000 as UNSIGNED ) as s, count(*) as count
 FROM (
    SELECT DISTINCT song_id FROM song_album_relation
    UNION
    SELECT DISTINCT song_id FROM song_artist_relation
) as t_tmp
 WHERE song_id NOT IN ( SELECT song_id FROM song )
 GROUP BY s
 ORDER BY s DESC

-- optimize table
optimize table album;
optimize table artist;
optimize table comment;
optimize table comment_progress;
optimize table log;
optimize table lyric;
optimize table song;
optimize table song_album_relation;
optimize table song_artist_relation;
optimize table user;