public function targetColumns($columns) {
        $this->targetColumns = is_array($columns) ? $columns : explode(',',
                        $columns);
        return $this;
    }
public function targetColumns($columns) {
        $this->targetColumns = is_array($columns) ? $columns : explode(',',
                        $columns);
        return $this;
    }
public function targetColumns ( $ columns ) { $ this -> targetColumns = is_array ( $ columns ) ? $ columns : explode ( ',' , $ columns ) ; return $ this ; }
This targets the query at the given columns
@param array|string $columns Array or comma-separated string of columns
@return Table
This targets the query at the given columns