I have a delivery table with the following columns

location c(10)
driver c(2)
pickupdate datetime
pickuptime c(8) 99:99:99

I want to sequence pickups for a given driver, location and day of the week by pickup time.
One wrinkle is that there are lots of pickups for any day and there can be some odd times. I want to use the most common time for a day.
That is, I want to wind up a table with one row for each driver, location and day of the week sequenced as above
Another wrinkle is that I might want to do this in MySql as well as in SQL Server.

Any ideas most welcome.