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Texas Womans University CSCI 3423
Texas Womans University
CSCI 3423.50
Quiz 2
1)To be considered a composite key, a key must contain at least two attributes.
2. A surrogate key may be appropriate under which of the following circumstances?
3. The primary key is used both to identify unique rows in a relation and to represent rows in relationships.
4. was the developer of the relational model for databases.
5. A(n) is a unique, numeric value that is appended to the relation to serve as the primary key.
6. A key must be unique.
7. Which of the following is not true about a relation?
8. To represent a relationship in the relational model, the primary key of one relation is placed into a second relation.
9. Every relation is a table, but not every table is a relation.
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