HOW CAN I CHANGE MY CASE STRUCTURE ?

Question

I know that my case structure will bring in these results:
SELECT
DISTINCT CASE WHEN (V.LCL_ER_RECV_DT - ADD_MONTHS(V.IND_ER_PER_END_DT,3)) BETWEEN 0 AND 30 THEN '1-30 DAYS LATE'
WHEN(V.LCL_ER_RECV_DT - ADD_MONTHS(V.IND_ER_PER_END_DT,3)) BETWEEN 31 AND 60 THEN '31-60 DAYS LATE'
WHEN(V.LCL_ER_RECV_DT - ADD_MONTHS(V.IND_ER_PER_END_DT,3)) BETWEEN 61 AND 90 THEN '61-90 DAYS LATE'
WHEN(V.LCL_ER_RECV_DT - ADD_MONTHS(V.IND_ER_PER_END_DT,3)) BETWEEN 91 AND 9999 THEN '91 DAYS+ LATE'
ELSE NULL
END DAYS,
NVL(LCL_PERM_NM,'UNKNOWN')TOR
FROM NCOER_STATS_VIEW V, LCL_ER_TYPE L
WHERE L.MIL_CD(+) = V.LCL_ER_TYPE_CD
AND v.lcl_er_form_cd = '4'
and NVL(v.lcl_omit_from_stats_ind,'N') <> 'Y'
AND v.psc_cd = '&&psc'
and V.lcl_er_recv_dt > ADD_MONTHS(V.ind_er_per_end_dt,3)
and nvl(v.lcl_omit_from_stats_ind,'N') <> 'Y'
and v.lcl_er_type_cd not in ('G','Y')
AND v.lcl_er_recv_dt >= to_date('&&rec_orig_dt','MMYYYY')
AND v.lcl_er_recv_dt <= LAST_DAY(to_date('&&rec_orig_dt','MMYYYY'))
DAYS TOR
1-30 DAYS LATE ANNUAL
1-30 DAYS LATE CHANGE OF RATER
1-30 DAYS LATE RELIEF FOR CAUSE/EER SPECL RPT
31-60 DAYS LATE ANNUAL
31-60 DAYS LATE CHANGE OF RATER
61-90 DAYS LATE ANNUAL
61-90 DAYS LATE CHANGE OF RATER
91 DAYS+ LATE ANNUAL
91 DAYS+ LATE CHANGE OF RATER
However how do I change the query or case structure to count each record?
I want a count for each line. Do I need a group by clause?

Answer 1

You can use something like
SELECT days, count(days) FROM
SELECT
DISTINCT CASE WHEN (V.LCL_ER_RECV_DT - ADD_MONTHS(
GROUP BY days