how to get the name of database which is preferred replica

Hello Experts,

i have to prepare a query in which after the where clause i want to say get me the name of database only if it ispreferred replica.

i see there is a function which gives 1 if the passed database is prefered replica.

but what i want is just oposite of it.

where (SELECT [master].sys.fn_hadr_backup_is_preferred_replica('%') = 1)

So i dont know the name of database but i always want to run my primary query only if it is prefered replica.

is there a way to achieve it?

-KAKA-