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- Question
The joining technique is useful when data from several relations are to be retrieved and displayed and the relationships are not necessarily nested.
Options- A. True
- B. False
- Correct Answer
- True
- 1. The primary key in a relation does not need to be underlined.
Options- A. True
- B. False Discuss
- 2. A foreign key may be null and still adhere to the referential integrity constraint.
Options- A. True
- B. False Discuss
- 3. Well-structured relations encourage anomalies of data.
Options- A. True
- B. False Discuss
- 4. If a relation is in third normal form, it does not need to be in second normal form.
Options- A. True
- B. False Discuss
- 5. A synonym is two or more attributes that have different names but the same meaning.
Options- A. True
- B. False Discuss
- 6. There should be one condition within the WHERE clause for each pair of tables being joined.
Options- A. True
- B. False Discuss
- 7. A transaction is the complete set of closely related update commands that must all be done, or none of them done, for the database to remain valid.
Options- A. True
- B. False Discuss
- 8. A correlated subquery is where the outer query depends on data from the inner query.
Options- A. True
- B. False Discuss
- 9. The code to create triggers and routines is stored in only one location and is administered centrally.
Options- A. True
- B. False Discuss
- 10. A function returns one value and has only output parameters.
Options- A. True
- B. False Discuss
Advanced SQL problems
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Correct Answer: False
Correct Answer: True
Correct Answer: False
Correct Answer: False
Correct Answer: True
Correct Answer: True
Correct Answer: True
Correct Answer: False
Correct Answer: True
Correct Answer: False
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