Case When Exists SQL
The Case-When-Exists expression in Oracle is really handy. Here's an example of how to use it in a sub-select to return a status. This SQL checks for a match between the PS_PERSON and PSOPRDEFN records to determine the person status. The idea is that if the operator is not in PS_PERSON then they are not a true person in PeopleSoft.
Please be aware that this SQL will only work if:
- You are using PeopleSoft HRMS/CS 8.9 or above
- You are using an Oracle database
select
O.OPRID,
O.EMPLID,
case when exists (
select 1
from PS_PERSON P
where P.EMPLID = O.EMPLID
) then 'Person' else 'Not a Person' end as PERSON_STATUS
from PSOPRDEFN O;
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