Re: Sensible and NonsenSQL Aspects of the NoSQL Hoopla
Date: Sat, 31 Aug 2013 08:46:59 -0700 (PDT)
Message-ID: <7322a365-118b-4e49-bf33-62f5075d413b_at_googlegroups.com>
Am Donnerstag, 29. August 2013 06:30:58 UTC+2 schrieb com..._at_hotmail.com:
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> A tuple/row of a relation/table is a point in a multidimensional space. The attribute/column names are the dimension names. They are the points in the space that satisfy the relation's predicate.
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> To think of a candidate key as an ordinate is, again, a non-relational way of >thinking and reduces a relation to a mere data structure instead of the >extension of the predicate of the variable or query that it is the value of.
No you got it! To access or to distinguish points in a multidimensional space you need additional information not provided with the relational model. Only the tacit assumption of grouping information into a tuples/rows... the missing information can calculated from the column data. Intepreting this grouping as records relations or statements is pretty irrelevant.
m.f.G.
Karl Scheurer
Received on Sat Aug 31 2013 - 17:46:59 CEST