SQL: SUM Information but retain ResourceID (EmployeeNum)

In the attached sample you will see sample telephony data from Cisco UCCX Express from the agentconnectiondetail table.

This is the query I am running:
SELECT *
FROM agentconnectiondetail
WHERE startdatetime >= TO_DATE('01-01-2015 05:00','%m-%d-%Y %H:%M') AND sessionseqnum = 0

My question is how can I make the information unique to the SessionID which is the unique identifier for the call but retain the employeenumber of the agent who answered the call?

For example I highlighted in the document on the sample tab the sessionID 43000086306. The data shows that for sessionID 43000086306 the call came in and rang at two agent positions before it was picked up by the third. You see this because the resourceID changes and 10 seconds of ringtime is logged for those positions but the phone was not picked up since the talktime is 0. How can I sum the ringtimes together and retain the resourceID number for the agent who picked up the call.
sample-data.xlsx
Ryan SimmonsBusiness Analyst IIIAsked:
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Mark BullockQA Engineer IIICommented:
Perhaps this would work.
SELECT acd.*
, (select sum(acd2.ringtime) from agentconnectiondetail acd2 where acd2.sessionid=acd.sessionid) as total_ringtime
FROM agentconnectiondetail acd
WHERE startdatetime >= TO_DATE('01-01-2015 05:00','%m-%d-%Y %H:%M') AND sessionseqnum = 0
AND talktime>0

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