Help using left outer joins in SQL...

Posted by Waffles on Stack Overflow See other posts from Stack Overflow or by Waffles
Published on 2011-02-23T23:23:01Z Indexed on 2011/02/23 23:25 UTC
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I'm trying to create a list of people, their friends, and their friends of friends.

My table of people is this:

People:
NAME
Jow
Smith
Sandy
Phil

Friends
LIKER LIKEE
jow   smith
smith jow
sandy phil

Now, what I want is a table like this:

User Friend FriendofFriend
Jow   smith  jow
Smith jow    smith
sandy phil
phil

I'm trying to create a table using the following:

SELECT P.NAME, F.LIKEE, F2.LIKEE
FROM PEOPLE P
LEFT OUTER JOIN FRIENDS F
ON P.NAME = F.LIKER
LEFT OUTER JOIN FRIENDS F2
ON F.LIKEE = F2.LIKER

But the above isn't working. How can I get a table of people and their friends, regardless of whether or not they actually HAVE any friends?

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