getConnection();
$sql = "
SELECT m.id, m.nome,
GROUP_CONCAT(pl.name SEPARATOR ', ') AS linee
FROM mescole m
LEFT JOIN mescole_lines ml ON m.id = ml.idmescola
LEFT JOIN production_lines pl ON ml.idlinea = pl.id
GROUP BY m.id
ORDER BY m.id DESC";
$stmt = $pdo->query($sql);
if ($stmt->rowCount() === 0) {
echo "