framework/Dbal/Query.php
public function delete($tables = null)
    {
        if (null !== $tables) {
            $this->tables($tables);
        }
        $this->action = 'delete';
        return $this;
    }
public function delete($tables = null)
    {
        if (null !== $tables) {
            $this->tables($tables);
        }
        $this->action = 'delete';
        return $this;
    }
public function delete ( $ tables = null ) { if ( null !== $ tables ) { $ this -> tables ( $ tables ) ; } $ this -> action = 'delete' ; return $ this ; }
Set all tables and set action to delete
@param mixed $tables
@return $this
Set all tables and set action to delete