Order volumes by weeks on top in increasing order.
select * from volume order by weeks_on_top
Which volumes lasted no more than 2 weeks on top?
select volume_id from volume where weeks_on_top <= 2
Which ones lasted more than 2 weeks on top?
select volume_id from volume where weeks_on_top > 2
What are the ceremony dates for these volumes?
select distinct t1.date_of_ceremony from music_festival as t1 join volume as t2 on t1.volume = t2.volume_id where t2.weeks_on_top > 2