Rectify this Analytical function

Question

Hi friends
This query is similar to what I had asked few days ago. I am getting data in the following manner:
Month | MOB | sum(NewAcct) | sum(ActiveAcct)
082009 | 0 | 1407 | 1358
082009 | 1 | 0 | 1277
082009 | 2 | 0 | 1000
092009 | 0 | 1308 | 1269
092009 | 1 | 0 | 1150
I have third column 'OpenAcct'. This column will retain MOB 0 value for each MOB for each month. The desired output will be
Month | MOB | NewAcct | ActiveAcct | OpenAcct
082009 | 0 | 1407 | 1358 | 1407
082009 | 1 | 0 | 1277 | 1407
082009 | 2 | 0 | 1000 | 1407
092009 | 0 | 1308 | 1269 |1308
092009 | 1 | 0 | 1150 | 1308
I have written the following query to achieve this result:
SELECT
x.OpenMonth,
x.MOB,
SUM(NewAccounts),
FIRST_VALUE(sum(NEWACCounts)) OVER (PARTITION BY x.openmonth ORDER BY MOB) AS OpenAcct,
SUM(ActiveAccounts)
from
select
openmonth,
mob,
newaccount,
activeaccounts
from table) x
But the output is not what I expect!
Please correct my query.

Answer 1

You are correct in saying this Frank.
GROUP BY function is there.
SELECT
x.OpenMonth,
x.MOB,
SUM(NewAccounts),
FIRST_VALUE(sum(NEWACCounts)) OVER (PARTITION BY x.openmonth ORDER BY MOB) AS OpenAcct,
SUM(ActiveAccounts)
from
select
openmonth,
mob,
newaccount,
activeaccounts
from table) x
group by
x.OpenMonth,
x.MOB
Here's the target table structure:
Month date;
MOB number;
TotalNewAccounts number;
TotalOpenAcct Number;
TotalActiveAccounts Number
Here's the source table structure:
openmonth date,
mob number,
newaccount number,
activeaccounts number
I hope this helps.