Numbers

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Numbers

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Jeff Moden SSC Guru Points: 1003863 More actions · Answer 1

michael.kaufmann (1/5/2012)
Stuart Davies (1/4/2012)
Dave62 (1/4/2012)
Here's another beauty.
Select ISNUMERIC('£,,1.,') As "String";
Still returns a 1 :crazy:
Based on Jeff Moden's SQL Spackle on ISNUMERIC[/url], any of these characters evaluates to 1; so I'd assume that even a combination of "valid ISNUMERIC characters" results as 1.
Adding a single non-ISNUMERIC character to the string will return 0 as result:
select ISNUMERIC('£,,1.,a') col1;
It was a couple of real life examples like this (when importing a csv) that gave me the idea for this QOTD
Glad I'm usually working in a German context--the field delimiter in a .CSV or .TXT file has to be a semicolon (;) which will evaluate to 0. One of the rare occassions where it's actually a benefit... ;-):cool:
-Michael

My personal favorite for ISNUMERIC...

SELECT ISNUMERIC(0x20), CAST(0x20 AS INT)

Fairly useless, but still a favorite. 😀

--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.

Change is inevitable... Change for the better is not.

Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

Jeff Moden SSC Guru Points: 1003863 More actions · Answer 2

michael.kaufmann (1/4/2012)
Stuart Davies (1/4/2012)
Know what you mean Tom - but I took the wording straight from BOL (I know, a scarely used resource 🙂 ) to try and avoid any arguments
For sake of completeness, here's also the link to BOL.
Anyway, Jeff's explanation in his SQL Spackle is definitely better and more entertaining :-)--so thanks to Jeff for his efforts and time and to Rich for sharing the link (and saving me the time to search for it myself).
Last but not least a great big thank you to Stuart for his QotD.
-Michael

The question and this whole thread has been a lot of fun. And thanks for the feedback on the article. I really do appreciate it.

--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.

Change is inevitable... Change for the better is not.

Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)