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Stairway to Database Design - STEP 1: Data Elements Expand / Collapse
Posted Wednesday, July 10, 2013 9:40 AM


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John Mitchell-245523 (7/10/2013)
Ross McMicken (7/10/2013)
What's the conversion factor from pallet to liters?

There isn't one, because they're different entities and therefore should not be stored in the same column. If you do as you suggest, you'll end up with something that looks like an EAV table. Some people are comfortable with that; others think that EAVs should be avoided at all costs. You'll make up your own mind, of course.


I look at this a a rule of logic. If something can be standardized as far say as weight then it is standardized. If it is not possible, it is not possible.

And as far as EAVs they might be useful but only under certain conditions. I have not found one yet, but have entertained the idea as well as what use to be called a data heap before that we redefined.

Not all gray hairs are Dinosaurs!
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