On Fri, 28 Oct 2011 01:00:28 -0400, Kagamin wrote:
> SQL uses `NULL` for all types.

Yes, but if you set a particular column value to NULL, it does not wipe 
away the column's meta-data.

> Did you try Algebraic - type-restricted version of Variant?

SQL implementations tend to use structure types for time and date and 
such.

Steve

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