Relational Data
u Different tables are related to one another with
primary and foreign key matches.
n Ex. Sales order table holds customer FK
u Relationships may be:
n (Zero or) One-to-one
n (Zero or) One-to-Many
n Self-join
u Relational Integrity (RI) can be enforced with
triggers, RI Builder, or code
n Ex. Cannot delete invoice with detail items