public function joinLeft(string $to, string $as, string $on, $onParams = null): self
    {
        return $this->join($to, $as, $on, $onParams, 'LEFT');
    }
public function joinLeft(string $to, string $as, string $on, $onParams = null): self
    {
        return $this->join($to, $as, $on, $onParams, 'LEFT');
    }
public function joinLeft ( string $ to , string $ as , string $ on , $ onParams = null ) : self { return $ this -> join ( $ to , $ as , $ on , $ onParams , 'LEFT' ) ; }
Join left.
@param  string   $to
@param  string   $as
@param  string   $on
@param  any|null $onParams
@return self
Join left .