doctrine:
    dbal:
        default_connection:   default
        connections:
            default:
                driver:   pdo_mysql
                host:     "%database_host%"
                port:     "%database_port%"
                dbname:   "%database_name%"
                user:     "%database_user%"
                password: "%database_password%"
                charset:  UTF8
            circutor3:
                driver:   pdo_sqlsrv
                host:     "%database_host_circutor3%"
                port:     "%database_port_circutor%"
                dbname:   "%database_name_circutor%"
                user:     "%database_user_circutor3%"
                password: "%database_password_circutor3%"
                charset:  UTF8
orm:
        auto_generate_proxy_classes: "%kernel.debug%"
        naming_strategy: doctrine.orm.naming_strategy.underscore
        auto_mapping: true

$em = $this->getDoctrine()->getManager('circutor3');

orm:
    default_entity_manager: default
    entity_managers:
        default:
            ...
        circutor3:
            connection: circutor3
            mappings:
                AppBundle: ~

$connection = $this->getDoctrine()->getConnection('circutor3');

$stmt = $connection->prepare($sql);
$stmt->execute();
return $stmt->fetchAll();