How to use $min in $find/$findAll in cds queries xsjs

Hi,

  I want to use $min while doing $find on an entity in my xsjs.

Here is the sample of $find:

         var caseKeys = CASE_MASTER.$findAll({

                "CASE_NUMBER": caseNumbers[i]

            });

Here CASE_MASTER is a table & CASE_NUMBER is a primary key.

CASE_MASTER contains various other fields too.

Now, how can I retrieve records based on $max values of a particular field.

Say, I want all the CASE_NUMBERs or all the records whose has max Salary.

Any help is highly appreciated.

Thanks