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  TalkFreelance     Design and Development     Programming     PHP and MySQL :

JOIN two queries using the 1st query results?

Thread title: JOIN two queries using the 1st query results?
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09-21-2012, 11:24 PM
#11
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Nailed the code into a single query.

PHP Code:
SELECT `ft`.`slug`, `ft`.`titleFROM `forum topics` AS `ftWHERE `ft`.`themeIN(SELECT `t`.`idFROM `users themes` AS `utLEFT JOIN `themes` AS `tON `ut`.`themeid` = `t`.`idWHERE `ut`.`userid` = '{$user->id}'ORDER BY `ft`.`dateASC 

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09-22-2012, 12:12 AM
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Okay. Another JOIN question. This time I'm trying to add two left JOINS to the same query.

Any reason why this isn't working?

PHP Code:
SELECT topics.id idtopics.themetopics.titletopics.revisedtopics.lockedtopics.dateusers.usernameusers.imageusers.rolethemes.id themeidthemes.name

FROM 
`forum topicstopics LEFT JOIN users ON users.id topics.author

LEFT JOIN themes ON themes
.id topics.theme

WHERE slug 
'{$slug}' ORDER BY topics.id LIMIT 1 
If I remove the second LEFT JOIN line and ", themes.id themeid, themes.name" the query works fine.

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09-22-2012, 12:35 AM
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That looks like it should work, what error are you getting?

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09-22-2012, 02:24 AM
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Ugh. Feel so stupid.

I had a column in my themes table called slug which was clashing with my topic slug. Simply rewriting that part as topics.slug did the trick.

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09-22-2012, 03:20 PM
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Have you thought about using a timestamp as your date/time? (I know its off topic, but I was reading your array!)

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09-23-2012, 12:47 AM
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I'm not sure what you mean? I am using timestamps however the column names are 'date.'

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