I want to copy from 11g DB table to 12C DB table and 12C DB table to 11g DB table.

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I have two different databases (11g & 12C) tables. Two different tables have same data

After some days 11g DB table added some different data and 12C DB table also added some different data.

But i need to copy from 11g DB Table to 12C DB Table and 12C DB Table to 11g DB Table.

What the query for this issue.

What I have tried:

I Don't know any thing about this issue, Please help me.

Posted 11-Sep-17 23:52pm

Member 13405266

Updated 12-Sep-17 0:14am

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OriginalGriff · Answer 1 · 2017-09-12T00:14:00

There is no "single query" which will allow you to "merge" two different databases, particularly if they have both had data added separately: it will depend on the database tables themselves, and if there is any dependant data in other tables. It will also depend on the datatypes you have used as a primary key: if you used auto incrementing integers, then you have a big problem as the ID's will have repeated. You also need to consider deletions and updates when you merge the tables - this isn't a trivial problem that you can just go "do this" and it'll be sorted.

The first thing you need to do though, is get a solution in place that removes one of the databases to make sure this doesn't have to be done every week.