SQL join, limit to one row per employee

I have an SQL doing an inner join between two tables.
The results have two rows for some employees, due to one table having two
'active' rows for that employee.
How can I write my SQL to only have one row for that employee?
This is my SQL.
SELECT em.*
FROM qs36f.v@ep_0 as ep
inner join qs36f.v@em_0 as em
on em.client = ep.client and em.rnum = ep.rnum and
em.enum = ep.employee#
where (ep.epstop = *0* or ep.epstop > *to_char*(*current_date*, 'yyyymmdd'
))
and ((em.eterm = *0* or em.eterm > *to_char*(*current_date*, 'yyyymmdd'
)) and em.empsts not in ('T'))
and (ep.eact1 = 'Y' or ep.eact2 = 'Y' or ep.eact3 = 'Y' or ep.eact4 =
'Y' or ep.eact5 = 'Y' or ep.eact6 = 'Y' or ep.eact7 = 'Y' or ep.eact8 = 'Y'
)
and ((ep.stp81 = *0* or ep.stp81 > *to_char*(*current_date*, 'yyyymmdd'
)) or
(ep.stp82 = *0* or ep.stp82 > *to_char*(*current_date*, 'yyyymmdd'
)) or
(ep.stp83 = *0* or ep.stp83 > *to_char*(*current_date*, 'yyyymmdd'
)) or
(ep.stp84 = *0* or ep.stp84 > *to_char*(*current_date*, 'yyyymmdd'
)) or
(ep.stp85 = *0* or ep.stp85 > *to_char*(*current_date*, 'yyyymmdd'
)) or
(ep.stp86 = *0* or ep.stp86 > *to_char*(*current_date*, 'yyyymmdd'
)) or
(ep.stp87 = *0* or ep.stp87 > *to_char*(*current_date*, 'yyyymmdd'
)) or
(ep.stp88 = *0* or ep.stp88 > *to_char*(*current_date*, 'yyyymmdd'
)))