Re: Create unique non-autoincrement key for 700,000 records?

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On Mon, Dec 15, 2008 at 9:29 PM, Rob Gould <gouldimg@xxxxxxx> wrote:

> I have a mySQL database with 700,000 records in it, which are presently
> keyed with an "auto-increment" field.
>
> What I'd like to do is create another field with a field where each and
> every record number has a unique keyvalue. Example:  "su5e23vlskd" for
> records 1, and "34fdfdsglkdj4" for record 2.  All that matters is that it's
> unique, and isn't a number that can be guessed or an "autoincrement" number,
> where a hacker can just figure out the keyvalue by incrementing numbers.  It
> doesn't matter to me if each keyvalue field is just numbers, or a
> number/letter combination - - - all that matters is that each keyvalue field
> is unique.  Is there an automatic way that mySQL could do that, or would I
> need to write a php script to somehow go through each record and create this
> unique value?
>
>
>
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>
update mytable set hash_field = md5(AutoIdField + unix_timestamp())

-- 

Bastien

Cat, the other other white meat

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