> > > > *] I need to generate a RANDOM UNIQUE number for every new record.
Is
> > there an
> > > > *] easy way to accomplish this inside of mySQL.
> > > > *]
> >
> > What are the requirements for 'random' and 'unique'? Do you need some
sort
> > of cryptographic randomness? Does uniqueness be kept across tables?
> >
> > If you 'only' need a unque id you could you AUTO_INCREMENT. If you want
> > uniqueness to carry over tables etc. you could take a look at the
aproach
> > made by the Apache module mod_unique_id. If you need a cryptographic
> > randomness you should look into some litterature about the area so as to
get
> > a better understanding of what you truly need.
>
> Would an MD5 encryption be another option? Use a auto incrementing ID to
> keep your records sorted, then the MD5 field for your unique randomness.
Good idea. Practical and easy (there are a lot fast MD5 implementations easy
accessable).
That should take care of the cryptographic randomness. Uniqueness won't be
true across tables but that might not be necessery. If it was a value
similar to mod_unique_id could be MD5'ied.
--
Aigars
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