October 2002
Beginner
864 pages
18h 41m
English
Content preview from Sams Teach Yourself SQL in 21 Days, Fourth Edition
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Day 8
Quiz
| 1: | True or false: Normalization is the process of grouping data into logically related groups. |
| A1: | True. |
| 2: | True or false: Having no duplicate or redundant data in a database and having a completely normalized database is always the best way to go. |
| A2: | False. Sometimes it is better to denormalize your database a bit to improve performance by decreasing the number of join operations required to retrieve data. |
| 3: | True or false: If data is in the third normal form, it is automatically in the first and second normal forms. |
| A3: | True. |
| 4: | What is a major advantage of a denormalized database? |
| A4: | A denormalized database will typically perform better than a normalized database because fewer join operations are required to retrieve data from tables. ... |
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