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Microsoft® SQL Server 2012 Unleashed by Alex T. Silverstein, Chris Gallelli, Paul T. Bertucci, Ray Rankins

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Linked Servers

Linked servers enable SQL Server–based applications to include most any other type of data source to be part of a SQL statement execution, including being able to directly reference remote SQL servers. They also make it possible to issue distributed queries, updates, deletes, inserts, commands, and full transactions on heterogeneous data sources across your entire company (network). SQL Server essentially acts as the master query manager. Then, via OLE DB providers and OLE DB data sources, any compliant data source is easily referenced from any valid SQL statement or command. For each data source, either they are directly referenced, or SQL Server creates provider-specific sub-queries issued to a specialized provider. This is ...

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