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sys.federation_member_history (Azure SQL Database)

Updated: November 21, 2014

This topic is OBSOLETE. You can find the most current version in the SQL 14 Transact-SQL Reference. See sys.federation_member_history.

The current implementation of Federations will be retired with Web and Business service tiers.  Consider deploying custom sharding solutions to maximize scalability, flexibility, and performance.  For more information about custom sharding, see Scaling Out Azure SQL Databases.

Returns historical information for each member of a federation. Sys.federation_member_history is specific to Microsoft Azure SQL Database and is not supported in on-premises SQL Server.


Columns Data type Description



Reference to federation id.



The unique id of the federation member



Datetime the federation member was dropped.



Datetime the federation member was created.

This view requires VIEW DATABASE STATE permission.

Cleanup of historical data is performed automatically every two weeks. Cleanup is triggered by operations that update the log information. This can result in historical information being retained for longer than two weeks if no new operations have been performed.

The drop_date and create_date columns are populated on the completion of an operation. For asynchronous operations these fields are populated when the operation completes fully, not when the command returns.

The value for federation_id is not reused within a single root database, and the value of member_id is not reused within a federation.

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