Data Modeling and Relational Databases. Simplicity does not precede complexity, but follows it. A picture is worth 10K words - but only those to describe the picture. Hardly any sets of 10K words can be adequately described with pictures. Alan Perlis Fools ignore complexity.
Pragmatists suffer it.
Some can avoid it. Geniuses remove it. It goes against the grain of modern education to teach children to program. Alan Perlis Contents 6.1. Data Normalisation 6.3.