How to Detect Overlapping Date Ranges in MySQL?

Determining Overlapping Date Ranges in MySQL

To ascertain conflicting date ranges within a given table, consider a tailored query that employs the following criteria:

WHERE new_start < existing_end AND new_end > existing_start

where:

• new_start and new_end represent the date range of the new session to be inserted
• existing_start and existing_end represent the date range of existing sessions

This query effectively identifies date ranges that intersect with the proposed new session, providing a more refined result compared to the original query.

Here's an updated version of the query:

SELECT *
FROM session
WHERE "2010-01-05" < end_date AND "2010-01-25" > start_date;

This query returns only conflicting sessions, omitting non-overlapping ones:

+----+------------+------------+
| id | start_date | end_date   |
+----+------------+------------+
|  2 | 2010-01-20 | 2010-01-30 |
+----+------------+------------+

The revised query ensures that only overlapping sessions are identified, providing a more precise result for conflict detection.

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