mysql - Room Booking Query -


i have problem in writing sql availables rooms tables.

my tables structures given below.

table booking id | start_date | end_date   table bookingroom (intermediate table) id   | booking_id   |room_id

a room can linked many bookings , booking can contain many rooms

table room contains id room

i have tried there probleme if room linked 2 differents bookings in separate dates comparaison maked first booking id 

select distinct r.id room r ,booking b,bookingroom br  r.id = br.id_room  , b.id = br.id_booking  , (            b.end_date < '05/14/2013'         or b.start_date > '05/15/2013'      )

can me write sql available rooms between checkin , checkout date.

if want list of rooms available entire range of desired dates, following might work:

select room.id room room.id not in    (                         select roomid                         bookingroom                             join booking                                 on booking.id = bookingroom.bookingid                         booking.startdate <= 'desiredenddate'                             , booking.enddate >= 'desiredstartdate'                         ) order room.id

so, using original example, might get:

select room.id room room.id not in    (                         select roomid                         bookingroom                             join booking                                 on booking.id = bookingroom.bookingid                         booking.startdate <= '2013-05-15'                             , booking.enddate >= '2013-05-14'                         ) order room.id

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