Re: Learning qsort

[Booth Martin <booth@xxxxxxxxxxxx>]

1. State-up, City-up
2. State-up, City-down
3. State-down, City-up
4. State-down, City-down
5. City-up, State-up
6. City-up,State-down
7. City-down, State-up
8. City-down, State-down

State-up, City-up != City-up,State-up

Here is the practice exercise: A two-column subfile; State & City.  
Click either heading and sort by that column. Clicking a column heading 
a second time reverses the sort.  Maintain the current sorting order for 
the non-clicked column.  This is the same behavior that we see and are 
used to in our e-mail folders.

On 12/13/2019 6:57 PM, Jon Paris wrote:
> If you have two keys the worst case scenario is 2 procedures, A in B, and B in A. Unless you also need A only and B only. That would be four procedures but could be achieved by just two and short circuit logic when a single key was needed.