Hi everyone trying to do an e-booking service for BBs. In mysql db I've got a booking table with an arrivalDate and a departureDate field for each Unit booked. My Units are the Rooms and in the Unit table. I want to check availability for every single unit. $result_dates=mysql_query("SELECT unit_ID FROM bookings WHERE unit_ID!=0 AND(arrivalDate<=$arrivalDate AND $arrivalDate<=departureDate OR arrivalDate<=$departureDate AND $departureDate<=departureDate OR $arrivalDate<=arrivalDate AND arrivalDate<=$departureDate OR $arrivalDate<=departureDate AND departureDate<=$departureDate)"); Is right to proceed like that? thanks for any piece of help Mandy --------------------------------- Yahoo! Mail : votre e-mail personnel et gratuit qui vous suit partout ! Créez votre Yahoo! Mail