ListAgg Over ListAgg - Oracle - sql

Question

I wanted to get some data from multiple rows under same column (SRAV.XYZ) and concat it with other col hence used the listagg query.
SELECT LISTAGG (
REGEXP_SUBSTR (SRAV.XYZ,
'[^:]+$'),
';')
WITHIN GROUP (ORDER BY
REGEXP_SUBSTR (
SRAV.XYZ,
'[^:]+$')) ||';'||SRA.ABC
/*(CASE
WHEN SRA.ABC like 'PROF.TMP' THEN SRA.ABC = 'TMP'
WHEN SRA.ABC like 'PROF' THEN SRA.ABC ='PROF'
ELSE SRA.ABC='EMPLOYEES' END) */
FROM TEST1 SPAEM,
TEST2 SRAV,
TEST3 srm,
TEST4 SRA
WHERE SRAV.RID = srm.RGID
AND SRAV.PID IN
('123RTU23',
'456U43',
'AB4577Y')
AND SRAV.XYZ IS NOT NULL
AND SPAEM.EMPID = srm.SEC_UUID
AND SRAV.PID = SRA.PRID
AND SPAEM.EMPID = 139806
group by ABC
I am able to get the output in the below format:
physics;PROF.TMP
bio;EMPLOYEES
Now, I am having 2 issues that I am unable to handle.
I want the output in the below format:
physics;PROF.TMP,bio;EMPLOYEES
My case when is not working ( hence commented ) when I am trying to concat.
The ideal output would be:
physics;TMP,bio;EMPLOYEES
Any help in this regard.
Regards,

Answer 1

CASE probably doesn't work because of LIKE; the way you put it, it acts as if it was =, actually. Wildcards are missing. Also, syntax you used seems to be wrong (from my point of view). Perhaps you meant to say something like this:
CASE
WHEN SRA.ABC like '%PROF.TMP%' THEN 'TMP'
WHEN SRA.ABC like '%PROF%' THEN 'PROF'
ELSE 'EMPLOYEES'
END
As of listagg over listagg: use your current query as a subquery or as a CTE, and then apply yet another listagg:
with your_current_query as
(select listagg(...) within group over (...) as result_1
from ...
where ...
)
-- apply listagg to result_1
select listagg(result_1, ', ') over (...) as final_result
from your_current_query
That's theory. If you want something more, provide a simple test case.