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Oracle Introduction to Oracle9i: SQL Sample Questions:

1. Examine the structure of the EMPLOYEES and DEPARTMENTS tables:

You want to create a report displaying employee last names, department names, and locations. Which query should you use to create an equi-join?

A) SELECT last_name, department_name, location_id
FROM employees , departments ;
B) SELECT e.last_name, d.department_name, d.location_id
FROM employees e, departments D
WHERE e.department_id =d.department_id;
C) SELECT e.last_name, d.department_name, d.location_id
FROM employees e, departments D
WHERE manager_id =manager_id;
D) SELECT employees.last_name, departments.department_name,
departments.location_id
FROM employees e, departments D
WHERE e.department_id =d.department_id;

2. You created a view called EMP_DEPT_VU that contains three columns from the EMPLOYEES and DEPARTMENTS tables:
EMPLOYEE_ID, EMPLOYEE_NAME AND DEPARTMENT_NAME.
The DEPARTMENT_ID column of the EMPLOYEES table is the foreign key to the primary key DEPARTMENT_ID column of the DEPARTMENTS table.
You want to modify the view by adding a fourth column, MANAGER_ID of NUMBER data type from the EMPLOYEES tables.
How can you accomplish this task?

A) ALTER VIEW emp_dept_vu (ADD manager_id NUMBER);
B) MODIFY VIEW emp_dept_vu (ADD manager_id NUMBER);
C) You must remove the existing view first, and then run the CREATE VIEW command with a new column list to modify a view.
D) MODIFY VIEW emp_dept_vu AS SELECT employee_id, employee_name, department_name, manager_id FROM employees e, departments d WHERE e.department_id = d.department_id;
E) CREATE OR REPLACE VIEW emp_dept_vu AS SELECT employee_id, employee_name, department_name, manager_id FROM employees e, departments d WHERE e.department_id = d.department_id;
F) ALTER VIEW emp_dept_vu AS SELECT employee_id, employee_name, department_name, manager_id FROM employee e, departments d WHERE e.department_id = d.department_id;

3. You need to perform these tasks:
1.Create and assign a MANAGER role to Blake and Clark
2.Grant CREATE TABLE and CREATE VIEW privileges to Blake and Clark
Which set of SQL statements achieves the desired results?

A) GRANT manager ROLE TO BLAKE,CLARK;
GRANT create table, create voew
TO BLAKE CLARK;
***MISSING***
B) CREATE ROLE manager;
GRANT create table, create view
TO manager;
GRANT manager TO BLAKE,CLARK;
C) CREATE ROLE manager;
GRANT create table, create voew
TO manager;
GRANT manager ROLE TO BLAKE,CLARK;

4. Evaluate this SQL statement:
SELECT e.EMPLOYEE_ID,e.LAST_NAME,e.DEPARTMENT_ID, d.DEPARTMENT_NAME
FROM EMP e, DEPARTMENT d
WHERE e.DEPARTMENT_ID = d.DEPARTMENT_ID;
In the statement, which capabilities of a SELECT statement are performed?

A) Difference, projection, product
B) Selection, intersection, join
C) Intersection, projection, join
D) Selection, projection, join
E) Difference, projection, join

5. Examine the structure of the EMPLOYEES table:

You need to create an index called NAME_IDX on the first name and last name fields of the EMPLOYEES table. Which SQL statement would you use to perform this task?

A) CREATE INDEX NAME_IDX (first_name, last_name);
B) CREATE INDEX NAME_IDX
FOR employees(first_name, last_name);
C) CREATE INDEX NAME_IDX (first_name AND last_name);
D) CREATE INDEX NAME_IDX
ON employees(first_name, last_name);
E) CREATE INDEX NAME_IDX
ON (first_name, last_name);
F) CREATE INDEX NAME_IDX
ON employees (first_name AND last_name);

Solutions: