<filter-fidder: sql, query>

Hi,

Hope you don't mind me hassling you about this yet again.

>> ... So you would need to run two queries, a LEFT JOIN and a 
>> RIGHT JOIN (or a LEFT JOIN with tables swapped) to get all
>> results.
> ... ... which is what I did in the end. 
except that on further checking it doesn't work!

This works fine:
SELECT dancedetails.dances.* FROM dancedetails.dances 
LEFT JOIN dancedata.dances 
ON dancedetails.dances.ddref=dancedata.dances.dkey 
WHERE dancedata.dances.dkey IS NULL;

But this never finishes:
SELECT dancedata.dances.* FROM dancedata.dances 
LEFT JOIN dancedetails.dances 
ON dancedata.dances.dkey=dancedetails.dances.ddref 
WHERE dancedetails.dances.ddref IS NULL;

And I don't understand why, for the life of me.

Donna

(PS: and I *have* RTFM)


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