Selecting only those records where there is only one row - Oraclw query

Experts,

I am reading a table in Oracle:
      Select   t1.CLAIM_NO
                              , t1.KICKOUT_CODE
                  , t1.cert_no
                   , t1.cost_center
                  , t1.arrv_date
       From Table1;

I would like to select only those records where there is only one row where t1.claim_no, t1.cert_no are the same.

Does anyone know how/if this can be coded as a single query?
moriniaAdvanced Analytics AnalystAsked:
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slightwv (䄆 Netminder) Commented:
Try this:
      Select   CLAIM_NO
                   ,KICKOUT_CODE
                   ,cert_no
                   ,cost_center
                   ,arrv_date
from(
      Select   t1.CLAIM_NO
                   , t1.KICKOUT_CODE
                   , t1.cert_no
                    , t1.cost_center
                   , t1.arrv_date
                  , count(*) over(partition by claim_no, cert_no) mycount
        From Table1
)
where mycount=1;
0

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