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Posted by Doug on 02/03/06 18:22
hmmm. i'd think you would be happier with even more abstraction then
either option.
have one table for models. it has the modelid, and the modelname, and
one row for each model.
then have one table for "dollars."
this will have "dollarid", a flag for cost or income, and a human
name. there will be one row for each type of income or cost, so the
total rows will be something like 14.
then have the "xref" table. It will have modelid, dollarid, and
dollaramt.
this will have one row for each model for each cost/income.
the advantage is that over time new costs or incomes will show up, and
you can easily add them. further, you don't have to have really awful
program logic to add up all of your costs and income for a specfiic
model.
hope this helps,
doug
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