public function queryAndFetchOne($sql, &$values=array())
	{
		$sth = $this->query($sql, $values);
		$row = $sth->fetch(PDO::FETCH_NUM);
		return $row[0];
	}
public function queryAndFetchOne($sql, &$values=array())
	{
		$sth = $this->query($sql, $values);
		$row = $sth->fetch(PDO::FETCH_NUM);
		return $row[0];
	}
public function queryAndFetchOne ( $ sql , & $ values = array ( ) ) { $ sth = $ this -> query ( $ sql , $ values ) ; $ row = $ sth -> fetch ( PDO :: FETCH_NUM ) ; return $ row [ 0 ] ; }
Execute a query that returns maximum of one row with one field and return it.

@param string $sql Raw SQL string to execute.
@param array &$values Optional array of values to bind to the query.
@return string
Execute a query that returns maximum of one row with one field and return it .