Question: I want to determine if two users (both using my app) have any mutual friends in common. The names/data of the users are irrelevant, the number of the mutual friends is irrelevant. I just need if two people have *any* friends on Facebook in common or not. The mutual friends may not be using the app, but the two ends ARE using my app. These were pretty easy in Graph API 1.0, but I'm wondering if what I'm trying to achieve is possible by any means in Graph API 2.0 or 2.1?

Answer: 
You can use the following query:-

```
SELECT count(*) FROM yourtable WHERE postUser = 'admin'

```

Here yourtable is the name of the database table.
```
SELECT count(*)
FROM tableName
WHERE postUser = 'admin'

```

where `tableName` is the name of that database table.