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- Question
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
- 1. When AUTOCOMMIT is set on, changes will be made automatically at the end of each SQL statement.
Options- A. True
- B. False Discuss
- 2. A function returns one value and has only output parameters.
Options- A. True
- B. False Discuss
- 3. The code to create triggers and routines is stored in only one location and is administered centrally.
Options- A. True
- B. False Discuss
- 4. A correlated subquery is where the outer query depends on data from the inner query.
Options- A. True
- B. False Discuss
- 5. 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
- 6. 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 Discuss
- 7. Triggers are stored blocks of code that have to be called in order to operate.
Options- A. True
- B. False Discuss
- 8. ROLLBACK WORK asks SQL to empty the log file.
Options- A. True
- B. False Discuss
- 9. The UNION clause is used to combine the output from multiple queries together into a single result table.
Options- A. True
- B. False Discuss
- 10. Subqueries can be nested multiple times.
Options- A. True
- B. False Discuss
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