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

I believe the following condition matches every possible overlapping case.

WHERE
(
    (ScopeStartDate <= EndDate AND ScopeEndDate >= StartDate)

)

except if you declare illogic timespans (for example, those which end before starting)