public function alterar(CentroCusto $obj)
 {
     $strSQL = "UPDATE FIN_CEN_CENTROS_CUSTO SET ";
     $strSQL .= "CEN_Descricao='" . $obj->getDescricao() . "', ";
     $strSQL .= "CEN_Observacao='" . $obj->getObservacao() . "', ";
     $strSQL .= "CEN_Status='" . $obj->getStatus() . "', ";
     $strSQL .= "CEN_DataHoraAlteracao = '" . date("Y-m-d H:i:s") . "', ";
     $strSQL .= "USU_Alteracao_ID = " . $_SESSION["USUARIO_ID"] . " ";
     $strSQL .= "WHERE CEN_ID=" . $obj->getId();
     return Db::getInstance()->executar($strSQL);
 }