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- Question
A reason for using an SQL view to hide columns is:
Options- A. to simplify a result only.
- B. to prevent the display of sensitive data only.
- C. to accomplish both of the above.
- D. None of the above are reasons for using an SQL view.
- Correct Answer
- to accomplish both of the above.
- 1. The SQL command to create a table is:
Options- A. MAKE TABLE.
- B. ALTER TABLE.
- C. DEFINE TABLE.
- D. CREATE TABLE. Discuss
- 2. 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
- 3. 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
- 4. 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
- 5. 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
- 6. What SQL structure is used to limit column values of a table?
Options- A. The LIMIT constraint
- B. The CHECK constraint
- C. The VALUE constraint
- D. None of the above is correct. Discuss
- 7. Which of the following locks the item from change but not from read?
Options- A. Implicit lock
- B. Explicit lock
- C. Exclusive lock
- D. Shared lock Discuss
- 8. What is the overall responsibility of the DBA?
Options- A. Facilitate the development and use of the database
- B. Create and populate tables
- C. Development, operation, and maintenance of the database and its applications
- D. Both the first and third answers above are correct. Discuss
- 9. Which of the following locks the item from access of any type?
Options- A. Implicit lock
- B. Explicit lock
- C. Exclusive lock
- D. Shared lock Discuss
- 10. Which of the following allows dirty reads, nonrepeatable reads and phantom reads to occur?
Options- A. Read committed
- B. Read uncommitted
- C. Repeatable read
- D. Serializable Discuss
SQL for Database Construction problems
Search Results
Correct Answer: CREATE TABLE.
Correct Answer: To accomplish both of the above.
Correct Answer: System date
Correct Answer: change the table structure.
Correct Answer: rows can either be inserted into a table one at a time or in groups.
Correct Answer: The CHECK constraint
Correct Answer: Shared lock
Correct Answer: Both the first and third answers above are correct.
Correct Answer: Exclusive lock
Correct Answer: Read uncommitted
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