The best way would be to modify your SQL insert query to do this,
however you can use triggers:

something like this might work:

create trigger foobar after insert on t1
for each row begin
    update t1 set t1.Hash = md5(now()) where t1.id = NEW.id
end;


On Wed, Aug 18, 2010 at 10:22 AM, Brendan Brink
<[email protected]> wrote:
> hi there,
>
> wanting to have a text field in a table have a default value of
> md5(time()) - is this possible in creating the table structure in
> MYSQL5
>
> So that when a new row inserted into a table, a hash field is
> automatically created?
>
> Cheers
> brendan.
>
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