Discussion
Changing cardinalities in a database is:
Answer: A
Correct answer: a common database design task.
Cardinalities change because requirements change - a one-to-many relationship becomes many-to-many when the business decides an item may belong to more than one category, or a maximum cardinality of one becomes optional. Such changes are routine, and they are handled by adding or removing an intersection table, or by altering a foreign key and its constraints, not by rebuilding the database.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development