Question: We shall use the term ________ to denote a candidate key that is chosen by the database designer as the principal means of identifying entities within in an entity set.
Answer:
MCQ: We shall use the term ________ to denote a candidate key that is chosen by the database designer as the principal means of identifying entities within in an entity set.
Correct Answer:
A. Primary key
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Related Questions
- 1. The _______ should be chosen such that its attributes are never, or very rarely changed.
- 2. ________ is the columns of a table that points to the candidate key of another table.
- 3. The table containing the foreign key is called the child table, and the table containing the candidate key is called the referenced or parent table.
- 4. The purpose of the foreign key is to identify a particular row of ___________.
- 5. The foreign key is equal to the candidate key in some row of the primary table, or else has no value (the NULL value.). This rule is called a ______ between the two tables.
- 6. ______ should not contain NULL value in its Attribute value.
- 7. An ER diagram can express the overall __________of a database graphically
- 8. Which of the following structure represent the entity sets?
- 9. Ellipses represent_________
- 10. Diamond Represents______
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