Question

I am making a project on a restaurant where I have put table reservation. I am having problem calculating the time span between two times. It should be like this:

If a person want to book table, he is putting a date and two times. I will have to check whether there are any booking in the time span between these two times. I have put the screenshot of my table structure with this question. Please help me.

(Full size image is here.)

Answer 1

select *
from booking
where (user_from between (booking_time_from AND booking_time_to))
     or (user_to between (booking_time_from AND booking_time_to))

where user_from and user_to are user input time