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- Question
The qualifier DISTINCT must be used in an SQL statement when we want to eliminate duplicate rows.
Options- A. True
- B. False
- Correct Answer
- True
- 1. 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
- 2. SELECT DISTINCT is used if a user wishes to see duplicate columns in a query.
Options- A. True
- B. False Discuss
- 3. DISTINCT and its counterpart, ALL, can be used more than once in a SELECT statement.
Options- A. True
- B. False Discuss
- 4. Data manipulation language (DML) commands are used to define a database, including creating, altering, and dropping tables and establishing constraints.
Options- A. True
- B. False Discuss
- 5. Scalar aggregate are multiple values returned from an SQL query that includes an aggregate function.
Options- A. True
- B. False Discuss
- 6. There is an equivalent join expression that can be substituted for all subquery expressions.
Options- A. True
- B. False Discuss
- 7. 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
- 8. The result of every SQL query is a table.
Options- A. True
- B. False Discuss
- 9. 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
- 10. 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
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