On 10/12/07, Clemens Schwaighofer <cs(at)tequila(dot)co(dot)jp> wrote:
> I probably need to approach the problem different. So both are read
> "independent" or something like this.
Also, email_a, email_b, etc. indicate that you need to consider
refactoring your schema.
You can find a lot of tutorials on normalization online.