Examlex
At the implementation level, the supertype and its subtype(s) depicted in the specialization hierarchy maintain a 1:1 relationship.
Mission
A specific task or duty assigned to a person or group, often implying a long-term goal or objective.
Slaves
Individuals who are legally owned by others and forced to work without pay, often under harsh conditions.
Christianity
A monotheistic religion based on the life and teachings of Jesus Christ, with believers known as Christians.
Q2: A composite identifier is a primary key
Q6: The _ command permanently saves all changes-such
Q7: The hierarchical data model was developed in
Q15: You can select partial table contents by
Q18: The _ model was developed to allow
Q21: The data warehouse development life cycle differs
Q23: Normalization purity is often easy to sustain
Q23: A _ relationship exists when an association
Q35: _ provide a description of the data
Q75: Subtypes that contain nonunique subsets of the