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the 2nd Chief assistant to the first lieutenant was earlier this evening scandalized when she was seen by the ceo singing at a karaoke bar to a japanese version of rick james's "Super fleak"... she did this, she said, because she had snitched and told her husband, a techie, about normal forms... he, at the same time, called me to clarify..
so here it is, for techies...
the primary key is the dominant type... a foreign key contains a pointer to data
that can only be accessed by first accessing the primary key column... it is its
only relation to this column, pointer arithmetic... so imagine a pk, then a fk that
points to another set of sets, which has a member that points to another set of sets,
each level of recursion increases complexity exponentially in terms of decryption
of the initial "mean" which contains information content information (set of sets)...
you can think of the second normal form as being the second universe of discourse
or "dimension" of data analysis... the reason we try to stop at the three is because
there is no fourth dimension... is my contribution to history (if you must know...
a young child asked)... where does the talk of it come from? mostly string theory
and conspiracies of american ... readers...