Information Modeling and Relational Databases, 2nd Edition

4. Uniqueness Constraints

4.1	Introduction to CSDP Step 4 Static and dynamic constraints Uniqueness constraints and arity checks
4.2	Constraining Unaries and Binaries Uniqueness constraints on unary fact types Uniqueness constraints on binary fact types
4.3	Constraining Longer Fact Types Uniqueness constraints on ternaries Uniqueness constraints on quaternaries, etc.
4.4	External Uniqueness Constraints Conceptual joins External uniqueness constraints
4.5	Arity Checks Keys and functional dependencies The n - 1 rule Rephrasing as conjunctions Objectified associations
4.6	Projections and Joins The projection operation The projection-join check
4.7	Summary