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 silly question

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chedderslam
Posting Yak Master

223 Posts

Posted - 2002-12-15 : 13:17:12
is there such a thing as a "LEFT INNER JOIN"?

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ValterBorges
Master Smack Fu Yak Hacker

1429 Posts

Posted - 2002-12-15 : 13:26:07
THE two contradict each other.

When the word LEFT is used meaning LEFT OUTER join it indicates that all existing values in the left set should be returned even if they don't exist in the right set.

INNER JOIN also know as an equi-join indicates that only items existing in the right and left set should be returned.

So a LEFT INNER JOIN would be like saying

"Give me all things that match in both right and left sets and all the ones that are in the left set".

Which would be like saying give me all the things in the left set and your back to a LEFT OUTER JOIN.


Edited by - ValterBorges on 12/15/2002 13:28:11
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chedderslam
Posting Yak Master

223 Posts

Posted - 2002-12-16 : 09:08:10
Thanks, ValterBorges. Yeah, I thought so, but just wanted to verify.

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