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

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 update mytable set hash_field = md5(AutoIdField + unix_timestamp())

I _think_ I understand that - - - - but what does the "AutoldField" variable mean?





On Monday, December 15, 2008, at 09:37PM, "Bastien Koert" <phpster@xxxxxxxxx> wrote:
>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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