Two questions: should the following be done in SQL or Perl, and, if SQL, how do I construct such a query?
I have three tables: The first is scheduled_availability, and contains an EmployeeID, a start datetime, and an end datetime. The second is appointments, and contains EmployeeID, appointment start datetime, and appointment end datetime. The last table is a list of all possible appointment times. What I'd like to do is select a list of appointment times from the third table that fall within the ranges specified in the scheduled_availability time, but not within the appointments table for a particular employee. In other words, I want to find which appointment times are still available.

Ideas?

2005-08-18 Retitled by Arunbear, as per Monastery guidelines
Original title: 'Yet Another Query Question'

In reply to SQL Query for Scheduling by Anonymous Monk

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