| left join with extra conditions
trouble with left join and extra conditions |
frankstuner
msg:4528445 | 4:29 pm on Dec 15, 2012 (gmt 0) |
I'm trying to setup a rating app for images. I want to display the images that haven't been rated by the current logged user.
This covers two tables, I've successfully joined the tables but the extra conditions:
1. must be an image
2. exclude any images that have already been rated by the current user
are not working.
Its displaying the results as if the 2 AND conditions aren't there at all.
SELECT ver_data_media.id, ver_data_media.value, ver_data_media.ref, ver_data_media.type, ver_data_rating.a
FROM ver_data_media
LEFT JOIN ver_data_rating
ON ver_data_media.ref = ver_data_rating.a
AND ver_data_media.type = 'image'
AND ver_data_rating.a != $current_user->ID
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Any advice would be greatly appreciated, thanks Frank.
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LifeinAsia
msg:4528879 | 5:53 am on Dec 17, 2012 (gmt 0) |
Try:
SELECT ver_data_media.id, ver_data_media.value, ver_data_media.ref, ver_data_media.type, ver_data_rating.a
FROM ver_data_media
LEFT JOIN ver_data_rating
ON ver_data_media.ref = ver_data_rating.a
WHERE ver_data_media.type = 'image' AND ver_data_rating.a != $current_user->ID
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