Hi, I have a table called Bookings which has two important columns; Booking_Start_Time and Booking_End_Time. These columns are both of type DATETIME. Given any day how can I calculate how many hours are available between the hours of 09.00 and 17.30 so a user can see at a glance how many hours they have unbooked on a particular day (i.e. 8.5 hours less the time of any bookings on that day), can this be done with a query or do I have to work it out in my code? Thanks for your help -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php