DQL Select every rows having one column's MAX value

Question

Working with Symfony 2 and Doctrine, I\'m searching for a way to select every rows having the max value in a specific column.

Right now, I\'m doing it in two queries

Answer 1

After some hours of headache and googling and stackOverflow readings... I finally found out how to make it.

Here is my final DQL queryBuilder code:

    $qb = $this->createQueryBuilder('a');
    $qb2= $this->createQueryBuilder('mss')
            ->select('MAX(mss.periodeComptable) maxPeriode')
            ->where('mss.affaire = a')
            ;

    $qb ->innerJoin('GAAffairesBundle:MontantMarche', 'm', 'WITH', $qb->expr()->eq( 'm.periodeComptable', '('.$qb2->getDQL().')' ))
        ->where('a = :affaire')
        ->setParameter('affaire', $affaire)
        ;

    return $qb->getQuery()->getResult();