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More fun with ISNUMERIC()


More fun with ISNUMERIC()

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ronmoses
ronmoses
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Comments posted to this topic are about the item More fun with ISNUMERIC()

-----
a haiku...

NULL is not zero
NULL is not an empty string
NULL is the unknown

Nakul Vachhrajani
Nakul Vachhrajani
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Hello!

For those who are interested in an official documentation on this behaviour, refer BOL at: http://msdn.microsoft.com/en-us/library/ms186272.aspx

Thank-you!

Thanks & Regards,
Nakul Vachhrajani.
http://nakulvachhrajani.com
Be courteous. Drive responsibly.

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Google Plus: +Nakul
ma-516002
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Doesn't explain why chr(13) is numeric... what function. Nice question.
savosin_sergey
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My Count is only 20 (while right answer is 21)! Here is text result of the query from Question:
Count       String
----------- -----------
20 (9),
(10), (11), (12),
(13), $(36), +(43), ,(44), -(45), .(46), 0(48), 1(49), 2(50), 3(51), 4(52), 5(53), 6(54), 7(55), 8(56), 9(57),


(1 row(s) affected)
Toreador
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I've just changed my Regional Settings to French, so the thousands seperator is a space. But even now, IsNumeric('1 234') returns 0.

I knew there was a good reason that I avoid this function!
paul.knibbs
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I was expecting an answer of 14 (numbers 0-9, +, -, . and $), but of course that wasn't an option, so I had to go and run the script to find out where I was wrong. I can see why , counts as numeric, but some of the other values that count as such are a bit baffling--characters 9, 11, and 12, for instance!
Duncan Pryde
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savosin_sergey (7/5/2010)
My Count is only 20 (while right answer is 21)! Here is text result of the query from Question:
Count       String
----------- -----------
20 (9),
(10), (11), (12),
(13), $(36), +(43), ,(44), -(45), .(46), 0(48), 1(49), 2(50), 3(51), 4(52), 5(53), 6(54), 7(55), 8(56), 9(57),


(1 row(s) affected)


Looks like a compatibility level issue. If you set the database to SQL Server 2000 compatibility mode, you lose the backslash character (92) from the list. Something to do with it being a valid currency character only in Japan/Korea for SQL 2000 but for all countries in SQL 2005-8.

See about half way down this page

Duncan
Duncan Pryde
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Great question by the way, thanks!

Duncan
Kari Suresh
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This query returns count as 20 when executing against "master" DB (excluding '\' ASCII character number 92) and returns 21 when executing with other databases.



KSB
-----------------------------
Thousands of candles can be lit from a single candle, and the life of the candle will not be shortened. Knowledge and happiness never decreases by being shared.” - Buddha
Duncan Pryde
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Kari Suresh (7/5/2010)

This query returns count as 20 when executing against "master" DB (excluding '\' ASCII character number 92) and returns 21 when executing with other databases.



As I mentioned above, that's almost certainly because your master database is in compatibility level 80 (SQL 2000), while your other databases are in compatibility level 90 or 100 (SQL 2005 or 2008).

Do check and let me know.

Duncan
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