Discussion
Data warehouse data are usually normalized.
Answer: B
Correct answer: False
Warehouse data is usually denormalised, not normalised. Normalisation protects a database against modification anomalies, which matters for operational data that is constantly updated; a warehouse is loaded in batches and read heavily, so the joins that normalisation requires cost more than the redundancy it would avoid. Star schemas are the usual result.
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