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Advanced SQL
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Question
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
Correct Answer
True
Advanced SQL problems
Search Results
1. There should be one condition within the WHERE clause for each pair of tables being joined.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
2. 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
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Correct Answer: True
3. The primary key in a relation does not need to be underlined.
Options
A. True
B. False
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Correct Answer: False
4. A foreign key may be null and still adhere to the referential integrity constraint.
Options
A. True
B. False
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Correct Answer: True
5. Well-structured relations encourage anomalies of data.
Options
A. True
B. False
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Correct Answer: False
6. A correlated subquery is where the outer query depends on data from the inner query.
Options
A. True
B. False
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Correct Answer: False
7. The code to create triggers and routines is stored in only one location and is administered centrally.
Options
A. True
B. False
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Correct Answer: True
8. A function returns one value and has only output parameters.
Options
A. True
B. False
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Correct Answer: False
9. When AUTOCOMMIT is set on, changes will be made automatically at the end of each SQL statement.
Options
A. True
B. False
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Correct Answer: True
10. With the UNION clause, each query involved must output the same number of columns, and they must be UNION compatible.
Options
A. True
B. False
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Correct Answer: True
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