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If you need to do a data migration from an Oracle database to SQL server, what approaches and technical solutions are the best practice?

Our database has about 100 million rows and a total of 52 tables.

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marked as duplicate by Jon Seigel, StanleyJohns, Mark Storey-Smith, ypercube, RolandoMySQLDBA May 18 '13 at 20:39

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You can do this directly from SQL Server Management Studio. Within SSMS, just right click the database, select Tasks -> Import Data, select an Oracle typed data source and set up your connection to the Oracle database.

Here's a really good description of the full procedure, including setting up an Oracle client on the machine doing the migration.

http://dbadiary.wordpress.com/2012/10/04/data-migration-from-oracle-to-sql-server-with-ssms/

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