Gib natürlichsprachlich wieder, wonach folgende SQL-Anfrage sucht:

with ProdAct as (
    select
        Prod.Name as PName,
        Act.Name as AName,
        count(Act.movie_id) as CountM
    from (
        select name, movie_id from actors
        union all
        select name, movie_id from actresses
    ) as Act
    inner join movies as Mov on Act.movie_id = Mov.mid
    inner join producers as Prod on Mov.mid = Prod.movie_id
    group by Prod.Name, Act.Name
    order by Prod.Name, Act.Name
)

select ProdAct.AName, ProdAct.PName, CountM
from ProdAct,
    (
    select AName, max(CountM) as maxValue
    from ProdAct group by AName
    ) as maxCount
where ProdAct.AName = maxCount.AName
and ProdAct.CountM = maxCount.maxValue