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lang-sql
VIRTUALfields derived from your 8 digit code. If these "numbers" are never added, divided or multiplied, then they should be stored as codes and not numbers - a bit like phones! BTW, I would recommend PostgreSQL over any MySQL deriveative - vastly superiour in virtually every way!CALCULATED- the calculation will be done on every query for any character [0 - 7] you choose. You have a really small amount of records so that won't be a problem. I have to go to bed now (it's 0200 in the morning), but I can write this up as an answer with a worked example or two tomorrow if you think that I've pretty much answered your question?