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A comment on The Functional Database [video]. Parent comment

Re:The Functional Database [video] by ExpiredLink on Saturday October 12, 2013 @01:54PM (#6539579)
Temporal databases and immutability are independent concepts. A 'time series database' only solves the simple temporal database problems. When validity comes into play things become really hard (something was entered yesterday but will be valid from tomorrow).
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Re:The Functional Database [video] by jacques_chester on Saturday October 12, 2013 @02:08PM (#6539632)
Temporal databases rely on the immutability of each record (whether by convention or as a system guarantee). Changes are no longer expressed with updates on a given row; instead you add new rows to represent the change.
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Re:The Functional Database [video] by ExpiredLink on Sunday October 13, 2013 @06:17AM (#6542084)
> Temporal databases rely on the immutability of each record

Some maybe, certainly not all! What you mean are 'historical' databases, a.k.a. time series.

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