help understanding the fql query for mutual friends

Question

Need to get the name and picture of mutual friends without using JS.

Found FQL query below for mutual friends:

"SELECT uid1 FROM friend WHERE uid2=[targetID] AND uid1 IN (SELECT uid2 FROM friend WHERE uid1=[sourceID])"

Is there a way that instead of returning just the uid1 I can get the name and picture of the person?

EDIT ----------- Think I found it.

"SELECT first_name, last_name, pic_small FROM user WHERE uid IN(SELECT uid1 FROM friend WHERE uid2=['targetID'] AND uid1 IN (SELECT uid2 FROM friend WHERE uid1=['sourceID'])) "

Answer 1

You can get mutual friends with the Graph API:

https://graph.facebook.com/me/mutualfriends/FRIEND_ID

You can read more about it in the User object under mutualfriends: https://developers.facebook.com/docs/reference/api/user/

To further add:

To get the pictures as well: https://graph.facebook.com/me/mutualfriends/FRIEND_ID/?fields=id,name,picture&access_token=ACCESS_TOKEN

Answer 2

SELECT uid, first_name, last_name, pic_small
FROM user
WHERE uid IN (
    SELECT uid2
    FROM friend
    WHERE uid1 = ['sourceID']
)
AND uid IN (
    SELECT uid2
    FROM friend
    WHERE uid1 = ['targetID']
)

This will find any user (A), that both the source user (B) and target user (C), are friends with. Not necessarily the other way around; A being friends with B and C.

If the friend-table truly is mirrored, (ie for every row (x,y), there is also row (y,x)) this distinction would not matter.