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Introduction to SQL
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Question
The command to eliminate a table from a database is:
Options
A. REMOVE TABLE CUSTOMER;
B. DROP TABLE CUSTOMER;
C. DELETE TABLE CUSTOMER;
D. UPDATE TABLE CUSTOMER;
Correct Answer
DROP TABLE CUSTOMER;
More questions
1. The object-oriented development life cycle is which of the following?
Options
A. Analysis, design, and implementation steps in the given order and using multiple iterations.
B. Analysis, design, and implementation steps in the given order and going through the steps no more than one time.
C. Analysis, design, and implementation steps in any order and using multiple iterations.
D. Analysis, design, and implementation steps in any order and going through the steps no more than one time.
Show Answer
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Discuss
Correct Answer: Analysis, design, and implementation steps in the given order and using multiple iterations.
2. The SQL command to create a table is:
Options
A. MAKE TABLE.
B. ALTER TABLE.
C. DEFINE TABLE.
D. CREATE TABLE.
Show Answer
Scratch Pad
Discuss
Correct Answer: CREATE TABLE.
3. A class is a concept, abstraction, or thing that makes sense in an application context.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: True
4. A ________ is a program that performs some common action on database data and that is stored in the database.
Options
A. trigger
B. stored procedure
C. pseudofile
D. None of the above is correct.
Show Answer
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Discuss
Correct Answer: stored procedure
5. Which of the following is an advantage of partitioning?
Options
A. Complexity
B. Inconsistent access speed
C. Extra space
D. Security
Show Answer
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Discuss
Correct Answer: Security
6. An entity class is a collection of entities and is described by the structure of the entities in that class.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: True
7. An attribute that names or identifies entity instances is a(n):
Options
A. entity.
B. attribute.
C. identifier.
D. relationship.
Show Answer
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Discuss
Correct Answer: identifier.
8. In this instance, dirty reads are disallowed, while nonrepeatable reads and phantom reads are allowed.
Options
A. Read committed
B. Read uncommitted
C. Repeatable read
D. Serializable
Show Answer
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Discuss
Correct Answer: Read committed
9. Which of the following occurs when a transaction rereads data and finds new rows that were inserted by a command transaction since the prior read?
Options
A. Nonrepeatable read
B. Phantom read
C. Dirty read
D. Consistent read
Show Answer
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Discuss
Correct Answer: Phantom read
10. Business Intelligence (BI) reporting systems
cannot
do which of the following operations?
Options
A. Filter data
B. Group data
C. Modify data
D. Both filter and group data
Show Answer
Scratch Pad
Discuss
Correct Answer: Modify data
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