Cobol - Re: OO and IBM z series COBOL was Re: Discussions of COBOLphilospphy

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Re: OO and IBM z series COBOL was Re: Discussions of COBOLphilospphy

Robert

2007-10-16, 9:55 pm

On Tue, 16 Oct 2007 09:40:04 -0600, Howard Brazee <howard@brazee.net> wrote:

>On Thu, 11 Oct 2007 22:13:57 -0500, Robert <no@e.mail> wrote:
>
>
>"Normal form" can be a religion. Do users care about Codd's rules as
>long as they can have reliable data?
>
>Actually users like data warehouses. How many data warehouses have
>everything normalized?

It is impossible for a warehouse to be normalized because its multiple sources are not in
sync with each other, technically known as incoherent.

A normalized database has one copy of each value, the 'correct' one. When a warehouse gets
two values from two sources, it doewn't know which is correct. If it picked one and
discarded the other, the second source would be out of balance, a column of numbers
wouldn't sum to the column total.

Never2far

2007-10-31, 1:43 pm

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