Checking for date range conflicts in MySQL

Question

I am writing a hotel booking system. after lots of studying (including stack overflow) i wrote this sql to find out free rooms:

SELECT
*
FROM room
WHERE
    room         


        

Answer 1

I think this might get you started in the right direction...

SELECT R.*
FROM room AS R
     LEFT OUTER JOIN bookings AS B USING (room_id)
WHERE B.room_id IS NULL
      OR (B.checkout < '$check_in'
          AND B.checkin > '$check_out')