Count and list rows? pl/sql - oracle

Question

I am trying to count all rows that meet a criteria, and then also have it list sequence numbers for each row so we can quickly identify those meeting the criteria. Ex: We know 5 meet criteria of Complete Response and we want to know there are 5 but also what those sequence numbers are. How would i write that in my query?
select
count(sf.protocol_subject_id) as responseCount, sf.BEST_RESPONSE
from oncore.sv_sub_followup sf
where sf.protocol_no = $P{pPclNo} and sf.best_response is not null
group by sf.best_response
order by decode(best_response, 'Complete Response', 1, 'Partial Response', 2, 'Stable', 3, 'Progressive', 4, 'Not Evaluable', 5)
I should also mentioned that this is one of 9 subreports compiling a larger report. Not sure if that makes a difference when trying to do this. I'm very new to pl/sql. Thanks in advance for any help.

Answer 1

If I got this right, you need to count the rows for each BEST_RESPONSE for a given PROTOCOL_NO, and also list the IDs (protocol_subject_id) of those rows.
You could use the analityc function LISTAGG, that concatenates field values over a group. Something like this:
SELECT
best_response,
COUNT(protocol_subject_id) AS responsecount,
LISTAGG(protocol_subject_id, ', ') WITHIN GROUP (
ORDER BY
1
) matching_rows_ids
FROM
sv_sub_followup
WHERE
protocol_no = :protocol_no
AND best_response IS NOT NULL
GROUP BY
best_response
ORDER BY
decode(best_response, 'Complete Response', 1, 'Partial Response', 2,
'Stable', 3, 'Progressive', 4, 'Not Evaluable',
5);

Answer 2

You can use a subquery to obtain your results like the below
SELECT responsecount,
sf1.best_response,
sf1.protocol_subject_id
(
select count(sf.protocol_subject_id) AS responsecount,
sf.best_response
FROM oncore.sv_sub_followup sf
WHERE sf.protocol_no = $p{ppclno}
AND sf.best_response IS NOT NULL
GROUP BY sf.best_response)rec,
oncore.sv_sub_followup sf1
WHERE sf1.protocol_no=$p{ppclno}
AND sf1.best_response=rec.best_response
ORDER BY instr('Complete Response,Partial Response,Stable,Progressive,Not Evaluable',sf1.best_response);