Oracle memilih catatan dengan kondisi beberapa kolom

Hitung baris yang relevan. Jika hanya ename yang dibutuhkan

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

EDIT

Mengikuti serangkaian ketentuan baru

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)
    ;