primary and foreign key


Primary And Foreign Keys Are Like A Parent - Child

a: Primary and foreign key ~
b: a Parent - Child relationship

What: "The basic rule of thumb is that Primary and Foreign keys are like a Parent - Child relationship. The Child stores the Parent's id. This way each Parent can have multiple Children. It can get a WHOLE lot more complicated, but this will give you a very good starting approach to most of your database solutions."

Writer: Michael Rodrigues
Date: Dec 16 2011 7:36 PM

Green Venn Diagram

METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.