MySQL/doctrine query to retrieve all elements greater than date

Question

I have a Symfony project with 2 entities like Session 1 <-> n Timeslots , (and many more other entities).

My problem is i can't find a query that would retrieve the list of Sessions where ALL the timeslots are greater than a given date. Is it possible to do it in one query?

I've tried with MIN (simplified version, without the extra JOIN with other entities):

SELECT s.id 
FROM session s
JOIN timeslot t ON t.sessionId = s.id
HAVING MIN(t.timelotDate) > '2019-05-05';

But i don't retrieve any element with this query.

I've made a sqlfiddle for it:
http://www.sqlfiddle.com/#!9/4b485b/5

Answer 1

use max() and group by

SELECT s.id 
FROM session s
JOIN timeslot t ON t.sessionId = s.id group by s.id
having max(t.timelotDate) > '2019-05-05'

Answer 2

You forgot GROUP BY :

SELECT session.id
FROM session
JOIN timeslot ON timeslot.sessionId = session.id
GROUP BY session.id
HAVING MIN(timeslot.timeslotDate) > '2019-05-05'

An alternate would be:

SELECT *
FROM session
WHERE NOT EXISTS (
    SELECT 1
    FROM timeslot
    WHERE timeslot.sessionId = session.id
    AND timeslot.timeslotDate <= '2019-05-05'
)