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Oracle Introduction to Oracle9i: SQL Sample Questions:
1. Which clause should you use to exclude group results?
A) RESTRICT
B) GROUP BY
C) ORDER BY
D) WHERE
E) HAVING
2. You are the DBA for an academic database. You need to create a role that allows a group of users to modify existing rows in the STUDENT_GRADES table.
Which set of statements accomplishes this?
A) CREATE ROLE registrar; GRANT UPDATE ON student_grades TO registrar; GRANT ROLE registrar to user1, user2, user3
B) CREATE NEW ROLE registrar; GRANT ALL ON student_grades TO registrar; GRANT registrar to user1, user2, user3
C) CREATE registrar; GRANT CHANGE ON student_grades TO registrar; GRANT registrar;
D) CREATE ROLE registrar; GRANT MODIFY ON student_grades TO registrar; GRANT registrar to user1, user2, user3
E) CREATE ROLE registrar; GRANT UPDATE ON student_grades TO registrar; GRANT registrar to user1, user2, user3;
3. Examine the structure of the EMPLOYEES table:
You want to create a SQL script file that contains an INSERT statement. When the script is run, the INSERT statement should insert a row with the specified values into the EMPLOYEES table. The INSERT statement should pass values to the table columns as specified below: Which INSERT statement meets the above requirements?
A) INSERT INTO employees
VALUES (emp_id_seq.NEXTVAL, '&ename', '&jobid',
2000, NULL, &did IN (20,50));
B) INSERT INTO employees
VALUES (emp_id_seq.NEXTVAL, '&ename', '&jobid', 2000, NULL, &did);
C) INSERT INTO (SELECT *
FROM employees
WHERE department_id IN (20,50))
VALUES (emp_id_seq.NEXTVAL, '&ename', '&jobid', 2000, NULL, &did);
D) INSERT INTO (SELECT *
FROM employees
WHERE (department_id = 20 AND
department_id = 50)
WITH CHECK OPTION )
VALUES (emp_id_seq.NEXTVAL, '&ename', '&jobid', 2000, NULL, &did);
E) INSERT INTO (SELECT *
FROM employees
WHERE department_id IN (20,50)
WITH CHECK OPTION)
VALUES (emp_id_seq.NEXTVAL, '&ename', '&jobid', 2000, NULL, &did);
4. Which three statements correctly describe the functions and use of constraints? (Choose three.)
A) Constraints prevent the deletion of a table if there are dependencies.
B) Constraints make complex queries easy.
C) Constraints enforce rules at the table level.
D) Constraints enforce rules at the view level.
E) Constraints provide data independence.
F) Constraints prevent the deletion of an index if there are dependencies.
5. Which SQL statement would you use to remove a view called EMP_DEPT_VU from your schema?
A) REMOVE VIEW emp_dept_vu;
B) DROP VIEW emp_dept_vu;
C) REMOVE emp_dept_vu;
D) DELETE emp_dept_vu;
E) DROP emp_dept_vu;
F) DELETE VIEW emp_dept_vu;
Solutions:
| Question # 1 Answer: E | Question # 2 Answer: E | Question # 3 Answer: E | Question # 4 Answer: A,C,D | Question # 5 Answer: B |
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