ขอคำแนะนำอีกซักครั้งครับ งมไม่เจอ.....ไม่เข้าใจด้วย..............................

$sql = "SELECT 
tbl_img.id_img,name_img,
tbl_album.id_album,name_album
FROM tbl_rel
INNER JOIN tbl_img ON tbl_rel.id_img=tbl_img.id_album
INNER JOIN tbl_album ON tbl_rel.id_album=tbl_album.id_album
 ";

$sql = "SELECT tbl_album.*,tbl_img.*FROM tbl_album,tbl_img
WHERE tbl_album.id_album = tbl_img.id_album
 ";