P Kishor wrote:
> On Sun, Oct 18, 2009 at 11:49 AM, Igor Tandetnik <[email protected]> wrote:
>> P Kishor wrote:
>>> Given a specific user_id (say, user_id = 1) how on earth do I get the
>>> following?
>>> idea_id idea created_by_name rating
>>> ---------- ----------- --------------- ----------
>>> 1 free coffee jim 100
>>> 2 long breaks jim 100
>>> 3 quit early joe NULL
>>
>> Describe in plain English precisely what you are trying to achieve. It's not
>> obvious to me what question this resultset is the
>> answer for.
>>
>
>
> Given a specific user, show me all the ideas, and, if the specific
> user has voted for an idea, show me the rating given to that idea by
> that user.
>
> So, in the above result set, all three ideas are shown, and Jim's
> ratings are shown. Since Jim didn't rate idea 3, 'NULL' is returned.
Did too:
INSERT INTO users_ideas (user_id, idea_id, rating) VALUES (1, 3, 50);
Anyway:
select * from ideas left join users_ideas
on (ideas.idea_id = users.idea_id and users.user_id = 1);
Igor Tandetnik
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