Oracle: how to get percent of total by a query?
Are you referring to the following? You need to find the total some separately.
- Reference SQLFIDDLE
Table:
ID NAME AMOUNT STATE
1 john 1000 fl
2 jane 5000 ga
3 james 2000 ca
4 tom 6000 ga
5 tim 8000 fl
6 jim 2000 ga
7 kate 8000 fl
8 jack 3000 tx
Results 1:
STATE SUM(AMOUNT)
ca 2000
fl 17000
ga 13000
tx 3000
Final Query :
select t1.state, concat(
round(((sum(t1.amount)/t2.total))*100,2),
'%') as pct
from t1,
(select sum(amount) as total from t1) as t2
group by t1.state
;
Results:
STATE COUNT(T1.ID) SUM(T1.AMOUNT) TOTAL PCT
ca 1 2000 35000 5.71%
fl 3 17000 35000 48.57%
ga 3 13000 35000 37.14%
tx 1 3000 35000 8.57%
count(1) is equal to sum(1) in your case.
Try something like this:
18:39:36 SYSTEM@dwal> ed
Wrote file S:\\tools\buffer.sql
1 select owner,
2 count(*) group_cnt,
3 sum(count(*)) over() total_cnt,
4 round(100*(count(*) / sum(count(*)) over ()),2) perc
5 from dba_objects
6 group by owner
7* order by 4 desc
18:39:57 SYSTEM@dwal> /
OWNER GROUP_CNT TOTAL_CNT PERC
------------------------------ ---------- ---------- ----------
SYS 31609 59064 53.52
PUBLIC 24144 59064 40.88
XDB 1660 59064 2.81
SYSTEM 597 59064 1.01
WMSYS 332 59064 .56
EXFSYS 312 59064 .53
IRKAZDATA 158 59064 .27
STRMADMIN 92 59064 .16
DBSNMP 55 59064 .09
RI 25 59064 .04
PASS 16 59064 .03
POTS 19 59064 .03
TI 11 59064 .02
STRMODS 11 59064 .02
OUTLN 10 59064 .02
APPQOSSYS 5 59064 .01
ORACLE_OCM 8 59064 .01
17 rows selected.
Elapsed: 00:00:00.16
update: or even simplier with ratio_to_report
18:53:36 SYSTEM@dwal> ed
Wrote file S:\\tools\buffer.sql
1 select owner,
2 round(100*ratio_to_report(count(*)) over (), 2) perc
3 from dba_objects
4 group by owner
5* order by 2 desc
18:54:03 SYSTEM@dwal> /
OWNER PERC
------------------------------ ----------
SYS 53.52
PUBLIC 40.88
XDB 2.81
SYSTEM 1.01
WMSYS .56
EXFSYS .53
IRKAZDATA .27
STRMADMIN .16
DBSNMP .09
RI .04
PASS .03
POTS .03
TI .02
STRMODS .02
OUTLN .02
APPQOSSYS .01
ORACLE_OCM .01
17 rows selected.
Elapsed: 00:00:00.20
Use ratio_to_report analytic function:
SELECT STATO,
COUNT(1) STATO_COUNT,
RATIO_TO_REPORT(COUNT(1)) OVER() * 100 STATO_PERCENT
FROM LOG_BONIFICA
GROUP BY STATO
so you don't need to calculate total row count and ratio yourself.