Attention: To align with new corporate security policies, and to match policies adopted by other communities within Oracle, the My Oracle Support Community access requirements will change beginning September 18, 2025. MOSC will now require that member accounts in our community be associated to a *corporate* email address. This means that users with generic domains (such as gmail.com, yahoo.com, and others) will no longer be granted access to the discussion forums and ideas labs. If this policy affects you, act now to change the email address that is associated with your Oracle (and community) account. Alternatively, you can opt to create a new Oracle account that uses your corporate email domain.

SQL*Plus (MOSC)

Very Large data intensive operation on 19c.

Oct 27, 2020 5:26AM in SQL*Plus (MOSC) 3 commentsAnswered

Hello,

I would like to explain my requirement with a scenario.

Table A is a source table with some 800 million (that's right) rows.
Table B is another source table with some 600 million rows!
I have to join table A and table B and based on this join conditions I have to regularly refresh another table C.
In each run of #3, it is expected to pull in about 450 million rows in table C.

Currently this whole process takes upto 12 hours through traditional SQL/Old school route.

Are there any new features available in 12c, 18c, or 19c to optimize and speed up above mentioned operation?

0

Howdy, Stranger!

To view full details, sign in to My Oracle Support Community.

Don't have a My Oracle Support Community account? Click here to get started.

Category Leaderboard

Top contributors this month