SQL Oracle/Joining two queries - sql

Question

I have two queries which I need to stitch together but I’m not sure how….
This first query pulls through the last three reconciled amounts for any chosen account from a table of accounts, reconciled amounts, periods, and any amount written off (if there was any)
SELECT *
FROM (
SELECT *
FROM (
SELECT gwod.account_id,
EXTRACT(month FROM gwod.charge_period_start) charge_period_month,
SUM(gwod.total_due_on_charge) total_due_on_charge,
SUM(gwod.amount_written_off) amount_written_off,
DENSE_RANK() over (PARTITION BY gwod.account_id
ORDER BY EXTRACT(month FROM
gwod.charge_period_start) DESC) rownumber
FROM Accounts_report gwod
WHERE account_id IN ('')
GROUP BY gwod.account_id,
EXTRACT(month FROM gwod.charge_period_start)
HAVING SUM (gwod.total_due_on_charge) <> 0) t1
WHERE t1.rownumber <=3)
PIVOT (MAX(charge_period_month) charge_period,
MAX(total_due_on_charge) total_due_on_charge,
MAX(amount_written_off) amount_written_off
FOR rownumber IN (1,2,3))
ORDER BY account_id
This query essentially gets me the list of accounts which I’m interested in from some additional tables...
WITH Account_Owners AS
(select gs.account_id, AP.SUPERVISOR
from Account_Info gs
Left join ACC_OWNERS AD
On gs.account_id = AD.ACCOUNT_NUMBER
Left Join Onwers_Info AP
On ad.owned_by = AP.ADNAME
group by account_id, AP.SUPERVISOR
)
SELECT distinct POLICY_INFO.ACCOUNT_ID, Count (POLICY_INFO.POLICY_NO) As
Active, a.supervisor
FROM POLICY_INFO
inner join Account_owners a on policy_info.account_id = a.account_id
WHERE Policy_Info.POLICY_STATUS = 'Active'
And policy_info.ACCOUNT_ID is not Null
And a.supervisor in ('David Smith')
GROUP BY Policy_Info.ACCOUNT_ID, a.supervisor
ORDER BY Policy_Info.ACCOUNT_ID
What I want to do is have the one query which pulls through the last three reconciled amounts (as per the first query) for all of the accounts of interest (as per the second query); I’m having trouble combining the two however into the single query however…

Answer 1

Add the first query as another set in the with clause and INNER JOIN it.Also DISTINCT might not be required in the final select as you are grouping any way. Try this and let me know if it's correct as it is very difficult for me to visualize data only with the query.
WITH Account_charges AS
(
SELECT *
FROM (
SELECT *
FROM (
SELECT gwod.account_id,
EXTRACT(month FROM gwod.charge_period_start) charge_period_month,
SUM(gwod.total_due_on_charge) total_due_on_charge,
SUM(gwod.amount_written_off) amount_written_off,
DENSE_RANK() over (PARTITION BY gwod.account_id
ORDER BY EXTRACT(month FROM gwod.charge_period_start) DESC) rownumber
FROM Accounts_report gwod
WHERE account_id IN ('')
GROUP BY gwod.account_id,
EXTRACT(month FROM gwod.charge_period_start)
HAVING SUM (gwod.total_due_on_charge) <> 0) t1
WHERE t1.rownumber <=3)
PIVOT (MAX(charge_period_month) charge_period,
MAX(total_due_on_charge) total_due_on_charge,
MAX(amount_written_off) amount_written_off
FOR rownumber IN (1,2,3))
),
Account_Owners AS
(select gs.account_id, AP.SUPERVISOR
from Account_Info gs
Left join ACC_OWNERS AD
On gs.account_id = AD.ACCOUNT_NUMBER
Left Join Onwers_Info AP
On ad.owned_by = AP.ADNAME
group by account_id, AP.SUPERVISOR
)
SELECT distinct POLICY_INFO.ACCOUNT_ID, Count (POLICY_INFO.POLICY_NO) As
Active, a.supervisor ,MAX(b.charge_period),MAX(b.total_due_on_charge),MAX(b.amount_written_off)
--use the proper column names.
FROM POLICY_INFO
inner join Account_owners a on policy_info.account_id = a.account_id
INNER JOIN Account_charges b ON policy_info.account_id = b.account_id
Where Policy_Info.POLICY_STATUS = 'Active'
And policy_info.ACCOUNT_ID is not Null
And a.supervisor in ('David Smith')
Group by Policy_Info.ACCOUNT_ID, a.supervisor
order by Policy_Info.ACCOUNT_ID;