Question

I have 2 tables:

1. event_serie
2. event

Every ‘event‘ has a relation to ‘event_serie‘ by event_serie_id foreign key and date_time column which is obviously time when event starts (YYYY-MM-DD HH:MM:SS format).

Now the funny and very difficult part for me – how can I select ‘event_serie’ which have events from the past ONLY or NO events at all? In other words I need to find ‘event_serie’ which have no today & future or 0 events.

I will appreciate both mysql and doctrine2 examples(if only it’s possible to do with DQL actually).

Any idea guys?

Answer 1

SELECT * 
  FROM my_table x
  LEFT
  JOIN my_other_table y 
    ON y.id = x.id
   AND y.date >= NOW()
 WHERE y.id IS NULL;

?