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Dead Crows Fly East

This is a very useful rule to use when building an Entity Relationship Diagram.


No crows were hurt during the construction of this diagram.


4 Responses to “Dead Crows Fly East”

  1. George McGeachie September 26, 2011 3:31 pm #

    John, do you mind if I link to this article in the book I’m co-authoring with Steve Hoberman?

  2. Joe Celko September 1, 2011 7:12 pm #

    I loved the TDAN article. My wife just wrote an article on breed-able animals in Second Life and other virtual worlds. Her fictional company was “Cuddly Crows” and she had a graphic of the expansion of a company and the failure (dead crows at the bottom of a pyramid).

  3. George McGeachie January 10, 2011 12:51 pm #

    Ever heard the rural saying about crows and rooks?
    “If you see one rook, that be a crow. If you see lots of crows, them be rooks.”
    You’d only have one crow (or perhaps two) in a data model; if there’s more than one, they must be rooks!

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