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Oracle Introduction to Oracle9i: SQL Sample Questions:

1. User Mary has a view called EMP_DEPT_LOC_VU that was created based on the EMPLOYEES, DEPARTMENTS, and LOCATIONS tables. She has the privilege to create a public synonym, and would like to create a synonym for this view that can be used by all users of the database.
Which SQL statement can Mary use to accomplish that task?

A) CREATE SYNONYM EDL_VU ON emp_dept_loc_vu FOR EACH USER;
B) CREATE PUBLIC SYNONYM EDL:VU FOR mary (emp_dept_loc_vu);
C) CREATE PUBLIC SYNONYM EDL_VU ON emp_dept_loc_vu;
D) CREATE SYNONYM EDL_VU FOR EACH USER ON emp_dept_loc_vu;
E) CREATE PUBLIC SYNONYM EDL_VU FOR emp_dept_loc_vu;
F) CREATE PUBLIC SYNONYM EDL_VU ON emp_dept_loc_vu FOR ALL USERS;

2. Which three statements about subqueries are true? (Choose three.)

A) Multiple columns or expression can be compared between the subquery and main query.
B) Only one column or expression can be compared between the subquery and main query.
C) A main query can have more than one subquery.
D) The subquery and main query must retrieve data from the same table.
E) A subquery can have more than one main query.
F) The subquery and main query can retrieve data from different tables.

3. You own a table called EMPLOYEES with this table structure:
EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) HIRE_DATE DATE
What happens when you execute this DELETE statement?
DELETE employees;

A) The data and structure of the EMPLOYEES table are deleted.
B) You get an error because the statement is not syntactically correct.
C) You get an error because of a primary key violation.
D) The data in the EMPLOYEES table is deleted but not the structure.

4. You need to create a view EMP_VU. The view should allow the users to manipulate the records of only the employees that are working for departments 10 or 20.
Which SQL statement would you use to create the view EMP_VU?

A) CREATE VIEW emp_vu AS
SELECT *
FROM employees
WHERE department_id IN (10,20)
WITH READ ONLY;
B) CREATE FORCE VIEW emp_vu AS
SELECT *
FROM employees
WHERE department_id IN (10,20);
C) CREATE FORCE VIEW emp_vu AS
SELECT *
FROM employees
WHERE department_id IN (10,20)
NO UPDATE;
D) CREATE VIEW emp_vu AS
SELECT *
FROM employees
WHERE department_id IN (10,20)
WITH CHECK OPTION;
E) CREATE VIEW emp_vu AS
SELECT *
FROM employees
WHERE department_id IN (10,20);

5. Which is an iSQL*Plus command?

A) DESCRIBE
B) DELETE
C) INSERT
D) RENAME
E) UPDATE
F) SELECT

Solutions: