Question: The _______ should be chosen such that its attributes are never, or very rarely changed.
Answer:
The address field of the person should not be the part of the primary key, since it’s likely to change. But a Driving license numbers on the other hand can be be guaranteed to never change.
MCQ: The _______ should be chosen such that its attributes are never, or very rarely changed.
Explanation:
The address field of the person should not be the part of the primary key, since it’s likely to change. But a Driving license numbers on the other hand can be be guaranteed to never change.
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Related Questions
- 1. ________ is the columns of a table that points to the candidate key of another table.
- 2. 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.
- 3. The purpose of the foreign key is to identify a particular row of ___________.
- 4. 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.
- 5. ______ should not contain NULL value in its Attribute value.
- 6. An ER diagram can express the overall __________of a database graphically
- 7. Which of the following structure represent the entity sets?
- 8. Ellipses represent_________
- 9. Diamond Represents______
- 10. Which of the following diagram link attributes to entity sets and entity sets to relationship sets?
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