SQL Clone
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


isnumeric not working


isnumeric not working

Author
Message
sql_learner29
sql_learner29
Say Hey Kid
Say Hey Kid (697 reputation)Say Hey Kid (697 reputation)Say Hey Kid (697 reputation)Say Hey Kid (697 reputation)Say Hey Kid (697 reputation)Say Hey Kid (697 reputation)Say Hey Kid (697 reputation)Say Hey Kid (697 reputation)

Group: General Forum Members
Points: 697 Visits: 922
isnumeric not working.........

select isnumeric('26d5')

it should result in = 0

but it is showing me 1...any help?
why is it not working??

Thanks


---------------------------------------------------

Thanks

GSquared
GSquared
SSC-Insane
SSC-Insane (23K reputation)SSC-Insane (23K reputation)SSC-Insane (23K reputation)SSC-Insane (23K reputation)SSC-Insane (23K reputation)SSC-Insane (23K reputation)SSC-Insane (23K reputation)SSC-Insane (23K reputation)

Group: General Forum Members
Points: 23365 Visits: 9730
"d5" means "decimal 5", similar to scientific notation. It means "26 followed by 5 zeroes". That's a number.

It's one of the main weaknesses of IsNumeric.

Sometimes, you have to use something like this:
declare @Str varchar(100);

select @Str = '26d5';

select
case patindex('%[^0-9]%', @Str)
when 0 then cast(@Str as Int)
else null
end;



- Gus "GSquared", RSVP, OODA, MAP, NMVP, FAQ, SAT, SQL, DNA, RNA, UOI, IOU, AM, PM, AD, BC, BCE, USA, UN, CF, ROFL, LOL, ETC
Property of The Thread

"Nobody knows the age of the human race, but everyone agrees it's old enough to know better." - Anon
Jeff Moden
Jeff Moden
SSC Guru
SSC Guru (85K reputation)SSC Guru (85K reputation)SSC Guru (85K reputation)SSC Guru (85K reputation)SSC Guru (85K reputation)SSC Guru (85K reputation)SSC Guru (85K reputation)SSC Guru (85K reputation)

Group: General Forum Members
Points: 85414 Visits: 41078
Heh... I normally hate the use of semantics but I have to deploy them for this one. Please forgive me... Blush

Despite appearances, ISNUMERIC is functioning properly even when it allows something as odd as your '26d5' example ... It works precisely the way it was designed to work and for exactly the task it was designed to solve. It identifies things that could be changed to some type of numeric data type. It was never desired for nor intended to be used as an ISALLDIGITS function. ISNUMERIC will even take currency symbols, commas, decimal points, engineering and decimal notations (like Gus pointed out), tabs, certain spaces, carriage returns, line feeds, and a whole bunch of other things.

Gus shows one possible way to derive functionality similar to an ISALLDIGITS function. You can also use WHERE somecolumnname NOT LIKE '%[^0-9]%' to check a whole column. For more information on the nuances of ISNUMERIC, please see the following article... heh... I can personally vouch for the author. :-P

http://www.planet-source-code.com/vb/scripts/ShowCode.asp?txtCodeId=1073&lngWId=5

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
If you think its expensive to hire a professional to do the job, wait until you hire an amateur. -- Red Adair

Helpful Links:
How to post code problems
How to post performance problems
Forum FAQs
Go


Permissions

You can't post new topics.
You can't post topic replies.
You can't post new polls.
You can't post replies to polls.
You can't edit your own topics.
You can't delete your own topics.
You can't edit other topics.
You can't delete other topics.
You can't edit your own posts.
You can't edit other posts.
You can't delete your own posts.
You can't delete other posts.
You can't post events.
You can't edit your own events.
You can't edit other events.
You can't delete your own events.
You can't delete other events.
You can't send private messages.
You can't send emails.
You can read topics.
You can't vote in polls.
You can't upload attachments.
You can download attachments.
You can't post HTML code.
You can't edit HTML code.
You can't post IFCode.
You can't post JavaScript.
You can post emoticons.
You can't post or upload images.

Select a forum

































































































































































SQLServerCentral


Search