Always On Availability Groups Functions (Transact-SQL)
Applies to: 
SQL Server
SQL Server provides the following Always On Availability Groups functions.
In This Section
sys.fn_hadr_is_primary_replica
sys.fn_hadr_backup_is_preferred_replica
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Applies to:
SQL Server
SQL Server provides the following Always On Availability Groups functions.
sys.fn_hadr_is_primary_replica
sys.fn_hadr_backup_is_preferred_replica