MySQL range date overlap check

Posted by Glide on Stack Overflow See other posts from Stack Overflow or by Glide
Published on 2010-03-30T14:24:57Z Indexed on 2010/03/31 8:43 UTC
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This table is used to store sessions

CREATE TABLE session (
  id int(11) NOT NULL AUTO_INCREMENT
, start_date date
, end_date date
);

INSERT INTO session
  (start_date, end_date)
VALUES
  ("2010-01-01", "2010-01-10")
, ("2010-01-20", "2010-01-30")
, ("2010-02-01", "2010-02-15")
;

We don't want to have conflict between ranges
Let's say we need to insert a new session from 2010-01-05 to 2010-01-25
We would like to know the conflicting session(s).

Here is my query:

SELECT *
FROM session
WHERE TRUE
  AND ("2010-01-05" BETWEEN start_date AND end_date
    OR "2010-01-25" BETWEEN start_date AND end_date
    OR "2010-01-05" >= start_date AND "2010-01-25" <= end_date
  )
;

Here is the result:

+----+------------+------------+
| id | start_date | end_date   |
+----+------------+------------+
|  1 | 2010-01-01 | 2010-01-10 |
|  2 | 2010-01-20 | 2010-01-30 |
+----+------------+------------+

Is there a better practice way to get that ?

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