Skip to Main Content

SQL & PL/SQL

Announcement

For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle.com. Technical questions should be asked in the appropriate category. Thank you!

Interested in getting your voice heard by members of the Developer Marketing team at Oracle? Check out this post for AppDev or this post for AI focus group information.

How To Merge a big table to another Big table

Rajan SwFeb 14 2025

Hi Experts,

I have two tables Tab1 and Tab2. Both are having around 10Billion records, and both the tables are partitioned on a date called entry_Date week wise.

Each table has 20 Columns.

Currently I am moving each partition wise from Tab1 to Tab2 and each partition is taking around 10Minutes for 10 Million records for a week.
Is there a better approach for this can Create a third table

Create table3 as select from Tab1 union all Select * form Tab2, once done can I rename the table3.

Please share me some good approach.

I am using Oracle 19c Exadata.

Comments

chonewell Nov 12 2024

My Oracle Cloud tenant, cloud account, and secure email have no issues. Why haven't I received my password reset email for Oracle Cloud? This is very strange, and our attempts have not been able to solve the problem. May I ask who I should turn to for help?

L. Fernigrini Nov 12 2024

If your account is a paid one, open a Support ticket.

If it is a Free Tier then you will have to rely on help from the community. Most probable cause that you did not receive the password reset email is that your account has been stolen and the email has been changed.

chonewell Nov 13 2024

Thank you for your reply!
But when I chatted with the online customer service, they told me that my Oracle Cloud tenant, account, and email were all fine. So, there shouldn't be a problem of theft.
I have a free account, but who can I contact on the forum? I can only post, but no one on the forum can view my account permissions, right. I am currently trying to reset MFA, I don't know if it works.
It's quite ridiculous that I have a free account and can't enjoy any services, but how can I become a paid user if I can't log in to my account.

1 - 3

Post Details

Added on Feb 14 2025
8 comments
143 views