Can the facebook API fetch only NEW comments?

Imagine you wanted to fetch the entries on a facebook page and its related comments to bring it into another application. That works fine using the facebook API.

B开发者_运维技巧ut if you want to track and fetch only those 'new' comments to previously already fetched posts, is it possible?

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Yes, you can use FQL and query the tables directly

https://developers.facebook.com/docs/reference/fql/

https://developers.facebook.com/docs/reference/fql/comment/

You will of course need to keep track of the last time you checked for comments for a given post, and constrain the query with the time column.