Discussion
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- Question
What SQL command will allow you to change the table STUDENT to add the constraint named GradeCheck that states that the values of the Grade column must be greater than 0?
Options- A. ALTER TABLE STUDENT ALTER CONSTRAINT GradeCheck (Grade > 0);
- B. ALTER TABLE STUDENT ADD CONSTRAINT GradeCheck (Grade > 0);
- C. ALTER TABLE STUDENT ADD CONSTRAINT GradeCheck CHECK (Grade > 0);
- D. None of the above is correct.
- Correct Answer
- ALTER TABLE STUDENT ADD CONSTRAINT GradeCheck CHECK (Grade > 0);
- 1. Which of the following is not considered to be a basic element of an enterprise-class database system?
Options- A. Users
- B. Database applications
- C. DBMS
- D. COBOL programs Discuss
- 2. Which of the following is not true about indexes?
Options- A. Indexes are created to enforce uniqueness on columns.
- B. Indexes are created to enable fast retrieval by column values.
- C. Columns that are frequently used with equal conditions in WHERE clauses are good candidates for indexes.
- D. Indexes are created with the ALTER TABLE command. Discuss
- 3. A relation is in 5NF when multivalued dependencies are isolated in their own relation.
Options- A. True
- B. False Discuss
- 4. An OLE DB rowset is equivalent to a cursor.
Options- A. True
- B. False Discuss
- 5. Some organizations take the stand that no application should ever employ the true name of a table.
Options- A. True
- B. False Discuss
- 6. We have been given access to the company's operational data, and have been asked to produce a report. We discover that some of the data we need are in an SQL server database while other needed data are in a separate Oracle database. This is an example of ________ .
Options- A. dirty data
- B. inconsistent data
- C. non-integrated data
- D. a "wrong format" problem Discuss
- 7. A servlet is a Java program that is invoked via HTTP on the Web server.
Options- A. True
- B. False Discuss
- 8. There should be one condition within the WHERE clause for each pair of tables being joined.
Options- A. True
- B. False Discuss
- 9. 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
- 10. An ID-dependent entity is an entity whose identifier is a composite identifier where no portion of the composite identifier is an identifier of another entity.
Options- A. True
- B. False Discuss
More questions
Correct Answer: COBOL programs
Correct Answer: Indexes are created with the ALTER TABLE command.
Correct Answer: False
Correct Answer: True
Correct Answer: True
Correct Answer: non-integrated data
Correct Answer: True
Correct Answer: True
Correct Answer: trigger
Correct Answer: False
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