SQL statement order by two fields to sort at the same time

        Multiple fields can be added after order by, separated by commas, as follows:

--f1 is in ascending order, f2 is in descending order, sql should be written like this
order by f1, f2 desc
-- can also be written like this, more clearly:
order by f1 asc, f2 desc
--If you use descending order, you must use two desc
order by f1 desc, f2 desc