MySQL check if two date range overlap with input

Question

I need to check if two dates over lap with another two dates in my database.

My database looks like this

+----+--------------+------------+------------+
         


        

Answer 1

This is just the where clause. Given InputStartDate and InputEndDate are given by user input, and DataStartDate and DataEndDate are the datetime values in the table:

where ((DataEndDate > InputStartDate) and (DataStartDate < InputEndDate))