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Re: Advice on SQL and records

From: Paul <paul_at_see.my.sig.com>
Date: Tue, 23 Aug 2005 17:06:42 +0100
Message-ID: <h7img1512u15iktiiqf4n72lmlertsmnt4@4ax.com>

"David Cressey" <david.cressey_at_earthlink.net> wrote:

> > What does "cardinality" mean? What's an "optimizer"?
 

> The cardinality of that table is the number of rows in the table.

Surely you mean records, or tuples? Rows are for spreadsheets.  

> The order of a table is the number of columns in it.
> "order" is a poor choice of terminology, since many people will read it as
> "Sort order".

That's maths for you - not always intuitive.

Paul...

-- 

plinehan __at__ yahoo __dot__ __com__

XP Pro, SP 2, 

Oracle, 9.2.0.1.0 (Enterprise Ed.)
Interbase 6.0.1.0;

When asking database related questions, please give other posters 
some clues, like operating system, version of db being used and DDL.
The exact text and/or number of error messages is useful (!= "it didn't work!").
Thanks.
 
Furthermore, as a courtesy to those who spend 
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do not top post.
Received on Tue Aug 23 2005 - 11:06:42 CDT

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