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Hi Every One,
Please help me to providing the best solution for below scenario.
I‘ve to migrate data from one DB to another DB . Both DB’s are different instance. I’ve created the DB links and granted Select privileges on required tables to destination Schema.
There are around 10 tables and each table contains 2 – 3 million rows approximately.
Now my question is for this data transfer should I use:
Using Direct Insert ..Select statement ( Which contains ONLY SQL and reduces context switching)
Copy the source table data into local collections and insert the data by selecting from collections.( By using limit )
And I cannot use COMMIT , So that the entire process executes successfully or fails.
I don’t want to some records to be inserted and if the process fails then do the analysis and insert the remaining records. This would be a problem when we are migrating data in production.
And what are the problems we face while accessing data over a DB link.