public function leftJoin($table, $alias = null, $on = null)
    {
        return $this->join($table, $alias, $on, 'LEFT JOIN');
    }
public function leftJoin($table, $alias = null, $on = null)
    {
        return $this->join($table, $alias, $on, 'LEFT JOIN');
    }
public function leftJoin ( $ table , $ alias = null , $ on = null ) { return $ this -> join ( $ table , $ alias , $ on , 'LEFT JOIN' ) ; }
LEFT OUTER Join a table

@param string $table
@param string $alias
@param string $on
@return $this
LEFT OUTER Join a table