mysql - How can I check for date range exists -


as may have noticed title, question quite difficult express, there problem:

i have mysql table data:

enter image description here

in registration form have specify reservation start , end times. how can check, whether there registered reservation specified time or not. example should not able put new reservation starts @ 13:20 , ends @ 15:00 etc.

if either start or end of new reservation want create inside current range, reservation should blocked. using :reservationstart , :reservationend these dates, query:

select *   reservations  :reservationstart between reservation_from , reservation_to or        :reservationend between reservation_from , reservation_to or

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