Eight Years on SO

After eight years on StackOverflow and more than 600 answers, these are my favourite three.

1. How to understand the fifth normal form? [🔗]
2. Composite primary key vs. an additional ID column. [🔗]
3. How to design this database to avoid the cyclic dependency? [🔗]

These are not the highest voted answers, but I like them. All three rely on basic time-tested knowledge and principles, favour simplicity and reasoning over confusion and technical trickery.