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Home ‣ Database ‣ Introduction to SQL Comments
- Question
The result of every SQL query is a table.
Options- A. True
- B. False
- Correct Answer
- True
- 1. The ADD command is used to enter one row of data or to add multiple rows as a result of a query.
Options- A. True
- B. False Discuss
- 2. There is an equivalent join expression that can be substituted for all subquery expressions.
Options- A. True
- B. False Discuss
- 3. The qualifier DISTINCT must be used in an SQL statement when we want to eliminate duplicate rows.
Options- A. True
- B. False Discuss
- 4. The SQL statement: SELECT Name, COUNT(*) FROM NAME_TABLE; counts the number of name rows and displays this total in a table with a single row and a single column.
Options- A. True
- B. False Discuss
- 5. SELECT DISTINCT is used if a user wishes to see duplicate columns in a query.
Options- A. True
- B. False Discuss
- 6. The rows of the result relation produced by a SELECT statement can be sorted, but only by one column.
Options- A. True
- B. False Discuss
- 7. 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 Discuss
- 8. ORDER BY can be combined with the SELECT statements.
Options- A. True
- B. False Discuss
- 9. Each index consumes extra storage space and also requires overhead maintenance time whenever indexed data change value.
Options- A. True
- B. False Discuss
- 10. To establish a range of values, < and > can be used.
Options- A. True
- B. False Discuss
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What about, UPDATE, DELETE, INSERT, ALTER queries?! They do not return a table