Date's data base example of Suppliers and Parts used in the presentation was
also used by me in 1996 demonstrating ordinal fractions as shown below. A
subselection is made by a subordinate ordinal fraction, say, 21131111, saying
that Smith in London has 3 red nuts on stock. The whole example data base is
selected by 211000000000.
211311110
{ Ordinal Fractions, copyright Bo Jacoby 1996, 2006-04-24, 2013
2 Database Examples
21 relational
211 Date's
21100001 Nut
2110001 Red
21101 London
211011 Smith
2113 Stock quantity
21131111 3
211000000
{ Ordinal Fractions, copyright Bo Jacoby 1996, 2006-04-24, 2013
2 Database Examples
21 relational
211 Date's
21100001 Nut
21100002 Bolt
21100003 Screw
21100004 Cam
21100005 Cog
2110001 Red
2110002 Green
2110003 Blue
21101 London
211011 Smith
211012 Clark
21102 Paris
211021 Jones
211022 Blake
21103 Athens
211031 Adams
2111 Supplier status
211111 20
211112 20
211121 10
211122 30
211131 30
2112 Product weight
21120011 12
21120013 14
21120015 19
21120022 17
21120033 17
21120034 12
2113 Stock quantity
21131111 3
21131113 2
21131115 1
21131122 2
21131133 4
21131134 1
21131213 3
21131222 2
21131234 4
21132111 3
21132122 4
21132233 4
21132234 2
21133124 5
Den 13:57 onsdag den 20. november 2013 skrev Richard Gaylord
<[email protected]>:
this might be of interest (note: when reference is made to Mathematica, it is
really referring to the Wolfram Language)
>
>http://www.youtube.com/watch?v=AGGGU7tVdEk
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