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I have a set of SQL scripts to migrate data from tables in SQL Server 2005 to Oracle 11. I want to compare the data in two databases to ensure that they are migrated correctly.
My source is: SQL Server 2005. It has 10 big tables with approx 80 million rows and 20 tables with approx 100,000 rows.
My target is: Oracle 11 on Exadata, which has the similar table structure to its source.
Any idea what I can do? Are there any tools available?
You could maybe design a function that will for each column on each table:
If the results are the same you probably have the same values in your two databases without needing transferring large data over the network.
The drawback is: if the results are not the same you don’t know where the difference lies. You could maybe partition your tables by chunks of 1000 rows or such for example.