How do I report the results of the previous record to the next record in a query
Hello
For example if I have data of the table as.
AC_CODE DATE CREDIT DEBIT
----------------------------------
1001 15 APRIL 15 10
1001 APRIL 25, 15 2
1005 5 APRIL 15 100
1005 8 APRIL 15 25
----------------------------------
And I want to train as below, where, BALANCE = (previous record BALANCE) + CREDIT - DEBIT
(assuming that NVL (, 0) for all columns)
(assuming the BALANCE reset after change of AC_CODE)
DATE AC_CODE CREDIT DEBIT BALANCE
--------------------------------------------
1001 15 APRIL 15 10 10
1001 APRIL 25 15 2 8
1005 5 APRIL 15 100 - 100
1005 8 APRIL 15 25 - 75
--------------------------------------------
(AC_CODE ORDER, DATE)
Of course, it can be reached using query of database function. My question is, is it possible by using a query without involving all functions.
Thank you
-Anand
Model clause could help you meet this goal...
Note: There is a separate area for SQL, PL/SQL issues here in OTN and don't forget to provide insertion, create scripts for your sample data for a quick response
with t as(select 1001 AC_CODE,to_date('15-APR-2015','DD-MON-yyyy') dt,10 credit,null debit from dual union all
select 1001,to_date('25-APR-2015','DD-MON-yyyy'),null,2 from dual union all
select 1005,to_date('05-APR-2015','DD-MON-yyyy'),null,100 from dual union all
select 1005,to_date('08-APR-2015','DD-MON-yyyy'),25,null from dual
)
select ac_code
,dt
,credit
,debit
,balance
from t
model
partition by (ac_code)
dimension by (row_number() over(partition by ac_code order by dt) rn)
measures (dt,credit,debit,0 as balance)
rules
(
balance[any] = nvl(balance[cv()-1],0) + nvl(credit[cv()],0) - nvl(debit[cv()],0)
)
;
Tags: Database
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