---------------------------------------------------------------------------
select name, durationinsec
from title
where durationinsec >
(select avg(durationinsec)
from title);
---------------------------------------------------------------------------select
name,
durationinsec,
(select avg(durationinsec) from title) as average,
durationinsec - (select avg(durationinsec) from title) as diff
from title;
---------------------------------------------------------------------------
select vpl.plid, name as title, avg_pl, durationinsec, durationinsec-avg_pl as diff
from title t
join
(select plid, avg(durationinsec) as avg_pl
from title
group by plid) vpl
on t.plid=vpl.plid
order by t.plid;
---------------------------------------------------------------------------
...