introduction-to-sql database question and answers -Page 6

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Introduction to SQL problems

1. The result of every SQL query is a table.
Options
A. True
B. False

Correct Answer: True

2. The rows of the result relation produced by a SELECT statement can be sorted, but only by one column.
Options
A. True
B. False

Correct Answer: False

3. The SQL keyword GROUP BY instructs the DBMS to group together those rows that have the same value in a column.
Options
A. True
B. False

Correct Answer: True

4. ORDER BY can be combined with the SELECT statements.
Options
A. True
B. False

Correct Answer: True

5. Each index consumes extra storage space and also requires overhead maintenance time whenever indexed data change value.
Options
A. True
B. False

Correct Answer: True

6. To establish a range of values, < and > can be used.
Options
A. True
B. False

Correct Answer: True

7. SQL provides the AS keyword, which can be used to assign meaningful column names to the results of queries using the SQL built-in functions.
Options
A. True
B. False

Correct Answer: True

8. The condition in a WHERE clause can refer to only one value.
Options
A. True
B. False

Correct Answer: False

9. If you are going to use a combination of three or more AND and OR conditions, it is often easier to use the NOT and NOT IN operators.
Options
A. True
B. False

Correct Answer: True

10. The keyword BETWEEN can be used in a WHERE clause to refer to a range of values.
Options
A. True
B. False

Correct Answer: True

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