Percentage from TOTAL in SQL [duplicate] - sql

Question

This question already has an answer here:
Percentage SQL Oracle
(1 answer)
Closed 1 year ago.
there is any way to calculate the first 80% percentage
select
testoo.ttamount,
egct.Category_name,
SUM(pola.LIST_PRICE * nvl(pola.QUANTITY,1)) * NVL(poh.RATE,1)
Line_amount,
ROUND ( SUM((pola.LIST_PRICE * nvl(pola.QUANTITY,1)) * NVL(poh.RATE,1)*100) / (testoo.ttamount) , 2 ) PERCENTAGE,
poh.CURRENCY_CODE
FROM
(SELECT
SUM(test.line_amount) TTAmount
FROM
( select
egct.Category_name,
SUM(pola.LIST_PRICE * nvl(pola.QUANTITY,1)) * NVL(poh.RATE,1)
Line_amount,
poh.CURRENCY_CODE
from EGP_CATEGORIES_TL egct,
PO_LINES_ALL pola,
PO_HEADERS_ALL poh
where
egct.category_ID=pola.category_ID
AND pola.po_header_id = poh.po_header_id
AND LANGUAGE='US'
AND TYPE_LOOKUP_CODE='STANDARD'
AND poh.APPROVED_FLAG='Y'
group by
egct.Category_name,
poh.CURRENCY_CODE,
poh.RATE ) Test ) Testoo,
EGP_CATEGORIES_TL egct,
PO_LINES_ALL pola,
PO_HEADERS_ALL poh
where
egct.category_ID=pola.category_ID
AND pola.po_header_id = poh.po_header_id
AND LANGUAGE='US'
AND TYPE_LOOKUP_CODE='STANDARD'
AND poh.APPROVED_FLAG='Y'
group by
egct.Category_name,
poh.RATE,
testoo.ttamount,
poh.CURRENCY_CODE
order by
Line_amount desc
for example the output
Category Percentage
1 32%
2 20%
3 20%
4 10%
5 18%
I want to get the high percentage which the percentage of it about 80 %
so the output will be
Category Percentage
1 32%
2 20%
3 20%
4 10%
5 18%
thanks.

Answer 1

You don't even need to calculate each percentage:
with t(x) as (
select * from table(sys.odcinumberlist(1,1,2,2,3,3,4,4,5,5))
)
select *
from (
select
x,
ratio_to_report(x)over() rtr,
percent_rank()over(order by x) pr
from t
)
where pr<=0.8;
Results:
X RTR PR
---------- ---------- ----------
1 .033333333 0
1 .033333333 0
2 .066666667 .222222222
2 .066666667 .222222222
3 .1 .444444444
3 .1 .444444444
4 .133333333 .666666667
4 .133333333 .666666667
8 rows selected.
Another variant for cumulative percentage filter:
select *
from (
select v.*, 100*sum(rtr)over(order by r) cumulative_percentage
from (
select
rownum r,
column_value val,
ratio_to_report(column_value) over() rtr
from table(sys.odcinumberlist(10,40,30,20))
) v
)
where cumulative_percentage<=80;
R VAL RTR CUMULATIVE_PERCENTAGE
---------- ---------- ---------- ---------------------
1 10 .1 10
2 40 .4 50
3 30 .3 80
3 rows selected.