Re: Design database schemas around a common subset of objects

[Rob Sargent]

> On Nov 7, 2021, at 6:10 PM, Rich Shepard <using SSN (social security numbers) 
> for people are a natural key as is the
> VIN (vehicle identification number) for ... vehicles.
> 
> Rich

Be very careful with SSN. Not as unique as you might think. As well as a 
stretch to call natural. 
> 
>