executeQuery($sql); $sql = <<<'SQL' ALTER TABLE Employees modify column `gender` enum('Male','Female', 'Divers') default NULL; SQL; $this->executeQuery($sql); $sql = <<<'SQL' ALTER TABLE ArchivedEmployees modify column `gender` enum('Male','Female', 'Divers') default NULL; SQL; return $this->executeQuery($sql); } public function down(){ return true; } }