Updating multiple fields using a single update statement.

Question

Hi All,
I am a beginner to Oracle. I have used the following Hint in an update query that is executed in Oracle 10G. We recently updated the Oracle to version 11g and when executing the query getting the following Error: ORA-01779: cannot modify a column which maps to a non key-preserved table. PFB the query. Please suggest me some ways that I can do to avoid this error.
UPDATE /*+ bypass_ujvc */
(SELECT t1.STG_DEL_CONDITION, t2.condition
FROM stg_reports_membenft_latest T1 JOIN (select ods_ssn_grp,sys_id, first_value(STG_DEL_CONDITION) over(PARTITION BY ods_ssn_grp,sys_id
ORDER BY STG_DEL_CONDITION DESC) AS
condition from stg_reports_membenft_latest) T2
ON T1.ods_ssn_grp = T2.ods_ssn_grp AND T1.SYS_ID=T2.SYS_ID ) x
SET x.STG_DEL_CONDITION = x.condition;
Thanks and Regards,
Karthik Sivakumar.

Answer 1

I used the below query and got the Result.
Thank You all
MERGE INTO stg_reports_membenft_latest x1
USING (SELECT distinct ods_ssn_grp,
sys_id,
First_value(STG_DEL_CONDITION) OVER(partition BY ods_ssn_grp,sys_id
ORDER BY STG_DEL_CONDITION DESC)
AS condition
FROM stg_reports_membenft_latest) x2
ON ( x1.ods_ssn_grp = x2.ods_ssn_grp
AND x1.SYS_ID = x2.sys_id )
WHEN matched THEN
UPDATE SET x1.STG_DEL_CONDITION=x2.condition;