Brian Dunning <[EMAIL PROTECTED]> wrote on 11/02/2005 09:12:39 PM:

> On Nov 2, 2005, at 6:03 PM, Matt Babineau wrote:
> 
> > It will do your whole table. Then give you 50 records.
> 
> But there won't be any duplicates, right? It won't include the same 
> records more than once. I know that sounds stupid, just trying to 
> debug an odd problem.
> 

I am not sure there is any rule that says ORDER BY RAND() is uniquely 
ordered.
http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html

However, if your underlying query has unique rows then ordering those rows 
randomly should produce a randomized unique set...What is the problem you 
are trying to solve?

Shawn Green
Database Administrator
Unimin Corporation - Spruce Pine

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