I need to select the most recent record for a work order (identified by WOP_WO_ID)
with who is assigned to the action (identified by WOP_WHO). Sample data is
below.

WOP_ID WOP_WO_ID WOP_DATE WOP_WHO WOP_ACTION
34333 5431 22-JAN-2001 10:22 203 Action sdkk
34334 5431 23-JAN-2001 11:10 256 Action kj9 n984j
34335 5431 24-JAN-2001 09:07 223 Action 234ff3
34336 5532 24-JAN-2001 08:43 298 Action vrf3
34337 5532 24-JAN-2001 09:54 209 Action 54f3

The result I need is:
WOP_WO_ID WOP_DATE WOP_WHO
5431 24-JAN-2001 223
5532 24-JAN-2001 209

How do I do it?

Thanks all.