Pbl requete hibernate

les requetes suivantes sont elles correctes. Il y a not mapped.

Code:

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Query query = session.createQuery("from Client where Login=?");
 
		query.setParameter(0, monClient.getLogin(), Hibernate.STRING);List<Client> list = query.list();

Code:

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Query query2 = session.createSQLQuery("Select max(idclient) from Client");
		List<Integer> list2 = query2.list();