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 an old thread, but use BETWEEN. This is an excerpt from my timeclock, pls modify to your needs...

$qs = "SELECT COUNT(*) AS `count` FROM `timeclock` WHERE `userid` = :userid 
                AND (
                    (`timein` BETWEEN :timein AND :timeout OR `timeout` BETWEEN :timein AND :timeout )
                    OR
                    (:timein BETWEEN `timein` AND `timeout` OR :timeout BETWEEN `timein` AND `timeout`)
                    );";

Answer 2

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))

Answer 3

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)

Answer 4

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.