Oracle väljer post med flera kolumner

Räkna relevanta rader. Om bara ename behövs

select ename
from mytable
where event in (37,49) and date is null
group by ename
having count(*) = 2

REDIGERA

Följer nya villkor

select distinct ename
from mytable t1
where not exists ( 
    select 1 
    from mytable t2
    where t2.ename = t1.ename and t2.event in (37,49) and t2.date is not NULL)
    ;