How can I retrieve an updated script in the oracle database? - sql

Question

How can I retrieve an updated script in the oracle database?
An incorrect script was run in the oracle database. I want to get this script back. how can I do that? The script is as follows.
--52 record
update cons.paymentplan_detail det set det.payment_date = to_char(ADD_MONTHS(to_Date (det.payment_date, 'YYYYMMDD'),3),'YYYYMMDD')
where det.oid in (select det.oid
from cons.instalment_instalment_loan ins,
cons.paymentplan_detail det,
cons.paymentplan_def def,
(select ins.loans_reference_no,min(det.payment_date) as payment_date
from cons.instalment_instalment_loan ins,
cons.paymentplan_detail det,
cons.paymentplan_def def
where ins.loan_state in ('OPEN', 'BLOCKED')
and ins.status = '1'
and def.status = '1'
and det.status = '1'
and ins.payment_plan_oid = det.payment_plan_oid
and det.plan_detail_status in ('NO','LT')
and ins.OID='251pfek38q43fg00'
and def.oid = det.payment_plan_oid
and def.payment_plan_status = 'GR'
and def.credit_oid = ins.oid
group by ins.loans_reference_no) t
where ins.loan_state in ('OPEN', 'BLOCKED')
and ins.status = '1'
and def.status = '1'
and det.status = '1'
and ins.payment_plan_oid = det.payment_plan_oid
and det.plan_detail_status in ('NO')
and ins.OID='251pfek38q43fg00'
and def.oid = det.payment_plan_oid
and def.payment_plan_status = 'GR'
and def.credit_oid = ins.oid
and t.loans_reference_no = ins.loans_reference_no
group by det.oid);

Answer 1

If you haven't COMMITted the data then use ROLLBACK.
Otherwise, your solution could be as simple as running the same query but subtracting 3 months:
update cons.paymentplan_detail det
set det.payment_date = to_char(
ADD_MONTHS(
to_Date (det.payment_date, 'YYYYMMDD'),
-3 -- Changed from +3 to -3
),
'YYYYMMDD'
)
where ...
If that won't work and you have COMMITted the data and the database has flashback activated then you can use a flashback query to find the old data from before the UPDATE.
If all that fails, then you can look and see if the database has a recent backup you can restore from.