advanced-sql database question and answers -Page 3

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Advanced SQL problems

1. A function returns one value and has only output parameters.
Options
A. True
B. False

Correct Answer: False

2. When AUTOCOMMIT is set on, changes will be made automatically at the end of each SQL statement.
Options
A. True
B. False

Correct Answer: True

3. 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

Correct Answer: True

4. The most frequently used relational operation, which brings together data from two or more related tables into one resultant table, is called an equi-join.
Options
A. True
B. False

Correct Answer: False

5. Triggers are stored blocks of code that have to be called in order to operate.
Options
A. True
B. False

Correct Answer: False

6. ROLLBACK WORK asks SQL to empty the log file.
Options
A. True
B. False

Correct Answer: True

7. The UNION clause is used to combine the output from multiple queries together into a single result table.
Options
A. True
B. False

Correct Answer: True

8. Subqueries can be nested multiple times.
Options
A. True
B. False

Correct Answer: True

9. Outer join is the same as equi-join, except one of the duplicate columns is eliminated in the result table.
Options
A. True
B. False

Correct Answer: False

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