1. Quote of the Week
Codd's relational model is based on set theory, and set theory simply doesn't work for database systems. It can't, for example, model a gum ball machine. Gum balls, you see, have only one attribute, which is color (gum balls don't have names, serial numbers, bar codes, or URLs). If you put 200 gum balls in a gum ball machine, the gum ball machines contains 200 gum balls. If you try to put 200 gum balls in a gum ball relation, you get a relation of 5 gum balls (the number of colors) and 195 duplicate errors. If you then take 5 gum balls out of the gum ball machine, it still contains 195 gum balls. If you take 5 gum balls out of the gum ball relation, it goes empty. --Jim Starkey, LinkedIn.com
2. To Laugh or Cry?
- How Many Data Model Layers Are Useful?
- Why Don't DBAs Join the NoSQL Revolution
- SQL NULL problems in analytics
4. Interesting elsewhere
5. And now for something completely different
- Pope John Paul II no saint, covered up sin
- Cardinal's vast luxury apartment in Vatican
- Man crushed to death by giant crucifix dedicated to Pope
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