Db::table('think_artist')

->alias('a')

->join('think_work w','a.id = w.artist_id')

->join('think_card c','a.card_id = c.id')

->select();

$join = [

    ['think_work w','a.id=w.artist_id'],

    ['think_card c','a.card_id=c.id'],

];

Db::table('think_user')->alias('a')->join($join)->select();