Hello.
No, you can't. But you can make some workarounds. For example
you may use triggers in 5.0.2 version (but it is still not
production ready) or use a separate field for storing the
value of the week.
Hany Nagaty <[EMAIL PROTECTED]> wrote:
> Hi all,
>
> I'm a bit new to MySQL, it's my first email to the list.
>
> Well, my question is: Can I have a key on a function of the column.
> I have some table with a date column in it. I wish to have a key on
> yearweek(datecolumn). I don't want to allow having duplicate weeks in
> the table.
>
> Thanks for your support.
>
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