If you have groups of related tables, you can present a view and then use triggers to handle inserts and updates spanning multiple tables in the view. Well, you could, but MySQL's views are broken and don't allow you to attach rules or triggers to them (I hear this may change soon, but I'm not sure). Both Postgres and SQLite handle this correctly.

Cheers,
Ovid

New address of my CGI Course.

In reply to Re^4: Creating a model of a bad database by Ovid
in thread Creating a model of a bad database by Ovid

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