On Tue, Aug 31, 2010 at 12:43 PM, David Mintz <da...@davidmintz.org> wrote:

> What would you do?
> Gratefully yours....

One way to handle the duplicate key problem is to append a flag to the
key when you mark the record inactive. So chsny...@gmail.com becomes
chsny...@gmail.com_20100831. That way your tables are ready for the
next chsny...@gmail.com to come along.

If you want to mark a user inactive AND prevent them from
reregistering, don't add change the key.
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