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- Question
SQL views can be used to hide:
Options- A. columns and rows only.
- B. complicated SQL syntax only.
- C. both of the above can be hidden by an SQL view.
- D. None of the above is correct.
- Correct Answer
- both of the above can be hidden by an SQL view.
- 1. Views constructed from SQL SELECT statements that conform to the SQL-92 standard may not contain:
Options- A. GROUP BY.
- B. WHERE.
- C. ORDER BY.
- D. FROM. Discuss
- 2. Which of the following is an SQL trigger supported by Oracle?
Options- A. BEFORE
- B. INSTEAD OF
- C. AFTER
- D. All of the above. Discuss
- 3. To update an SQL view, the DBMS must be able to associate the column(s) to be updated with:
Options- A. a particular column in a particular underlying table.
- B. a particular column in a particular row.
- C. a particular row in a particular underlying table.
- D. None of the above is correct. Discuss
- 4. For what purposes are views used?
Options- A. To hide columns only
- B. To hide rows only
- C. To hide complicated SQL statements only
- D. All of the above are uses for SQL views. Discuss
- 5. What is an SQL virtual table that is constructed from other tables?
Options- A. Just another table
- B. A view
- C. A relation
- D. Query results Discuss
- 6. A ________ is a stored program that is attached to a table or a view.
Options- A. pseudofile
- B. embedded SELECT statement
- C. trigger
- D. None of the above is correct. Discuss
- 7. When using the SQL INSERT statement:
Options- A. rows can be modified according to criteria only.
- B. rows cannot be copied in mass from one table to another only.
- C. rows can be inserted into a table only one at a time only.
- D. rows can either be inserted into a table one at a time or in groups. Discuss
- 8. The SQL ALTER statement can be used to:
Options- A. change the table structure.
- B. change the table data.
- C. add rows to the table.
- D. delete rows from the table. Discuss
- 9. Which is NOT one of the most common types of SQL CHECK constraints?
Options- A. System date
- B. Range checks
- C. Lists of values
- D. Comparing one column value to another within the same table Discuss
- 10. What is an advantage of placing computations in SQL views?
Options- A. To save users from having to write an expression.
- B. To ensure that the results are consistent.
- C. To accomplish both of the above.
- D. None of the above is correct - computations cannot be placed in a view. Discuss
SQL for Database Construction problems
Search Results
Correct Answer: ORDER BY.
Correct Answer: All of the above.
Correct Answer: a particular row in a particular underlying table.
Correct Answer: All of the above are uses for SQL views.
Correct Answer: A view
Correct Answer: trigger
Correct Answer: rows can either be inserted into a table one at a time or in groups.
Correct Answer: change the table structure.
Correct Answer: System date
Correct Answer: To accomplish both of the above.
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