alter table playlist
    add column amount_praise int(11) DEFAULT 0 COMMENT '点赞数';

alter table playlist
    add column amount_play int(11) DEFAULT 0 COMMENT '播放量';

alter table playlist
    add column default_play_num int(11) DEFAULT 0 COMMENT '默认播放数';

alter table playlist
    add column default_praise_num int(11) DEFAULT 0 COMMENT '默认点赞数';