Question

Is is possible to query facebook for information on which pages (on current domain) users liking the current page, also liked? Basically, being able to create a “Users liking this page also liked:”, followed by list of pages on the current domain.

Answer 1

The only way I think you can realistically do this is by subscribing to the edge.create event on a like button and storing it in your own database with the user_id, page address etc.

https://developers.facebook.com/docs/reference/javascript/FB.Event.subscribe/

With FQL,the problem is that you would need to read the ‘url_like’ table to find this information out, but the only indexable field on this is user_id, which means you could only query for the current active user. If you do want to show the current user other pages on your site they like, you can use a query such as following:

 SELECT url FROM url_like WHERE user_id = me() and strpos(url, 'http://www.example.com') = 0

But as I say, for the use case you describe you would need to store this information yourself and then perform your own query to workout the most popular posts. Alternatively the recommendations plugin might meet your needs

https://developers.facebook.com/docs/reference/plugins/recommendations/