An Error Was Encountered

Error Number: 1064

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'GROUP BY tbl_artista.nome_artista ORDER BY nome_artista' at line 2

SELECT tbl_artista.id_artista,tbl_artista.nome_artista FROM tbl_artista, tbl_obra left join tbl_obra_galeria on tbl_obra.id_obra = tbl_obra_galeria.id_obra WHERE tbl_artista.publicada = 1 AND tbl_obra.id_artista = tbl_artista.id_artista AND tbl_obra_galeria.id_galeria = GROUP BY tbl_artista.nome_artista ORDER BY nome_artista