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sys.availability_databases_cluster (Transact-SQL)

Contains one row for each availability database on the instance of SQL Server that is hosting an availability replica for any AlwaysOn availability group in the Windows Server Failover Clustering (WSFC) cluster, regardless of whether the local copy database has been joined to the availability group yet.

Note Note

When a database is added to an availability group, the primary database is automatically joined to the group. Secondary databases must be prepared on each secondary replica before they can be joined to the availability group.

Applies to: SQL Server (SQL Server 2012 through current version).

Column name

Data type

Description

group_id

uniqueidentifier

Unique identifier of the availability group in which the availability group, if any, in which the database is participating.

NULL = database is not part of an availability replica of in availability group.

group_database_id

uniqueidentifier

Unique identifier of the database within the availability group, if any, in which the database is participating. group_database_id is the same for this database on the primary replica and on every secondary replica on which the database has been joined to the availability group.

NULL = database is not part of an availability replica in any availability group.

database_name

sysname

Name of the database that was added to the availability group.

If the caller of sys.availability_databases_cluster is not the owner of the database, the minimum permissions required to see the corresponding row are ALTER ANY DATABASE or VIEW ANY DATABASE server-level permission, or CREATE DATABASE permission in the master database.

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