Create a Tally or Numbers Table

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Create a Tally or Numbers Table

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An Phu

Posted Monday, July 13, 2009 5:58 PM

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I prefer to use "Number" (one-based) so that I can distinguish it from "WholeNumber" which is zero-based. The column name I used for both tables is "value".

Post #752404

Jeff Moden

Posted Tuesday, July 14, 2009 4:59 AM

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I'd have a hard time doing that because Number is a reserved word but to each their own. Also, are you implying that you have two separate tables? One for one-based and the other for zero-based? If so and if the use of BETWEEN is a pain, why not just have a single table starting at zero and a pass-through view with a >0 criteria? The underlying clustered index would still be used in either case.

Also, although I appreciate why you called your tables what you did and why, would it not be less confusing to casual users of your system to call one-based Number1 and zero-based Number0?

--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."

For better, quicker answers on T-SQL questions, click on the following...
http://www.sqlservercentral.com/articles/Best+Practices/61537/

For better answers on performance questions, click on the following...
http://www.sqlservercentral.com/articles/SQLServerCentral/66909/

Post #752572

An Phu

Posted Tuesday, July 14, 2009 5:09 PM

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I didn't think of them but now that you pointed them out, you are right on both observations.

1. A single table starting at zero and a pass-through view with a >0 critiera.
2. Number1 and Number0 would be easier for casual user.

>if the use of BETWEEN is a pain
I'm curious how you would use BETWEEN when you need a zero-based number table.

Post #753113

Jeff Moden

Posted Tuesday, July 14, 2009 7:08 PM

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What I meant by the BETWEEN was, if you have a zero-based table and need a unit-based solution, then the WHERE clause would need to include WHERE N BETWEEN 1 AND @DesiredInt. That would also allow you to use just a single table.

--Jeff Moden

Post #753131

ben.mcintyre

Posted Thursday, November 24, 2011 4:39 PM

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Jeez Jeff, I knew you'd been doing Tally tables for a long time, but you wrote the article THAT long ago ?
Talk about nativity ...

Post #1211764

Jeff Moden

Posted Thursday, November 24, 2011 5:09 PM

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ben.mcintyre (11/24/2011)

Jeez Jeff, I knew you'd been doing Tally tables for a long time, but you wrote the article THAT long ago ?
Talk about nativity ...

--Jeff Moden

Post #1211767

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