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Posts: 161
Computer / SQL question: Why would something with no value (e.g. '') *not* be Null?
Posted by
JaxSean (aka JaxSean)
Nov 19 '09, 11:23
there's technically nothing there, right?
so nothing isn't the same as ""?
Responses:
becourse of the Big Bang -- nm
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Danedukenuuk
Nov 19, 11:26
depending on the flavor of SQL, an empty appearing cell could not be null
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prayformojo
Nov 19, 11:26
4
Nice, thanks. -- nm
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JaxSean
Nov 19, 11:29
empty is also something and has a value "0" as an example or "space" -- nm
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Danedukenuuk
Nov 19, 11:27
2
uh, not in programming. -- nm
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decline
Nov 19, 11:28
1
no in the evaluation of "data" it has since "null" is a property of "data" -- nm
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Danedukenuuk
Nov 19, 11:29
"NULL" is a special value in SQL that invalidates logical comparisons. '' is just an empty string. -- nm
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Beryllium
Nov 19, 11:23
1
(this isn't really an explanation of why, but it is an explanation of how to deal with it) -- (link)
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Beryllium
Nov 19, 11:25
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