Microsoft® SQL Server 2012 Unleashed

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The INFORMATION_SCHEMA User

The INFORMATION_SCHEMA user owns all the information schema views installed in each database. These views provide an internal view of the SQL Server metadata that is independent of the underlying system tables. Some examples of these views include INFORMATION_SCHEMA.COLUMNS and INFORMATION_SCHEMA.CHECK_CONSTRAINTS. The INFORMATION_SCHEMA user cannot be dropped from the database.

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