Dependency theory (database theory)
Dependency theory is a subfield of database theory which studies implication and optimization problems related to logical constraints, commonly called dependencies, on databases. The best known class of such dependencies are functional dependencies, which form the foundation of keys on database relations. Another important class of dependencies are the multivalued dependencies. A key algorithm in dependency theory is the chase, and much of the theory is devoted to its study.
Dependencies
- functional dependency
- join dependency
- multivalued dependency
- tuple-generating dependency
- equality-generating dependency
- embedded dependency
- inclusion dependency
- full typed dependency
gollark: Ooh. What's the maximum level?
gollark: - Weapons have a cooldown of 1 hour. Therefore, it is best to go around firing them every hour or so.- Firing weapons at people's stuff is required to level up and get new decorations.- If you wait a long time, people will probably have better equipment than you, so you will get even less XP.
gollark: Why?
gollark: You just need to wait and/or pick up the snow lying around.
gollark: I have some theories on the (very limited) possible utility of walls, but no solid evidence regarding them.
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