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The right place to store allowable values for a field is in a separate lookup table, with a foreign key constraint that forces the value to be one of the keys from the lookup table. MySQL supports this just fine as long as you use InnoDB tables.

In reply to Re: Migrating database field values rules from Perl code to DB by perrin
in thread Migrating database field values rules from Perl code to DB by punch_card_don

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