Mysql:slet rækker i to tabeller med fremmednøgler

Prøv dette, håber det vil hjælpe.

DELETE FROM departure, departure_time
USING departure
INNER JOIN departure_time
WHERE departure_date = '2016-09-30'
      AND departure_time.id = departure.id

Eller

DELETE FROM departure, departure_time
USING departure
INNER JOIN departure_time
WHERE departure_date = '2016-09-30'
      AND departure_time.departure_id = departure.id

Eller du kan bruge ON DELETE CASCADE som vil fungere automatisk for dig.