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

You can cover all date overlapping cases even also when toDate in database can possibly be null as follows:

SELECT * FROM `tableName` t
WHERE t.`startDate` <= $toDate
AND (t.`endDate` IS NULL OR t.`endDate` >= $startDate);

This will return all records that overlaps with the new start/end dates in anyway.