public function values($column) {
		$res = [];
		while($row = $this->next())
			$res[] = $row[$column];
		return $res;
	}
public function values($column) {
		$res = [];
		while($row = $this->next())
			$res[] = $row[$column];
		return $res;
	}
public function values ( $ column ) { $ res = [ ] ; while ( $ row = $ this -> next ( ) ) $ res [ ] = $ row [ $ column ] ; return $ res ; }
Return all values of a column.
@param  string $column
@return array
Return all values of a column .