get list of facebook users who are using specific application using FQL

Question

I am trying to fetch following case using FQL

If few users have authorized \"Application A\" then is it possible to know that currently how many users are using tha

Answer 1

is_app_user on the user table when requesting friends returns this data.

SELECT uid,is_app_user FROM user WHERE uid IN (SELECT uid2 FROM friend WHERE uid1 = me())

or...

SELECT uid,is_app_user FROM user WHERE is_app_user AND uid IN (SELECT uid2 FROM friend WHERE uid1 = me())

Which is a bit tighter - only returning those users in-app.