Help in SQL requested

Question

Hi,
I have the data like given in the table below :
Cust     Prod     Week     Handling     TSales     HW
c1     p1     W1     1     20     20
c1     p2     W1     0     20     0
c1     p3     W1     1     20     20
c2     p1     W1     0     12     0
c2     p2     W1     1     12     12
c2     p3     W1     1     12     12
TSales is actually a customer level data only but it kept in Cust Product level. Now I have do something like :
select SUM(HW) group by Prod,week => As Numerator
and
select SUM(distinct TSales) group by week => As Denorminaotr
How can I acieve this in a SQL.
Regards,
Koushik

Answer 1

with t as
select 'c1' cust, 'p1' prod, 'W1' week, 1 handling, 20 Tsales, 20 HW from dual
union all
select 'c1', 'p2', 'W1', 0, 20, 0 from dual
union all
select 'c1', 'p3', 'W1', 1, 20, 20 from dual
union all
select 'c2', 'p1', 'W1', 0, 12, 0 from dual
union all
select 'c2', 'p2', 'W1', 1, 12, 12 from dual
union all
select 'c2', 'p3', 'W1', 1, 12, 12 from dual
select prod, week, sum(numerator)/sum(denominator) final_value from
select
prod, week, sum(HW) over (partition by prod, week) numerator,sum(distinct TSales) over (partition by week) denominator
from t
) group by prod, week;
Output:
"PROD"     "WEEK"     "FINAL_VALUE"
"p2"     "W1"     "0.375"
"p1"     "W1"     "0.625"
"p3"     "W1"     "1"