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Oracle Introduction to Oracle9i: SQL Sample Questions:

1. Examine the structure of the EMPLOYEES table:
EMPLOYEE_ID NUMBER Primary Key
FIRST_NAME VARCHAR2 (25)
LAST_NAME VARCHAR2 (25)
HIRE_DATE DATE
Which UPDATE statement is valid?

A) UPDATE employees
SET first_name = 'John',
SET last_name = 'Smoth'
WHERE employee_id = 180;
B) UPDATE employee
SET first_name = 'John'
AND last_name = 'Smith'
WHERE employee_id = 180;
C) UPDATE employees
SET first_name = 'John'
SET last_name = 'Smith'
WHERE employee_id = 180;
D) UPDATE employee
SET first_name = 'John', last_name = 'Smith'
WHERE employee_id = 180;

2. Evaluate this SQL statement:
SELECT e.employee_id, (.15* e.salary) + (.5 * e.commission_pct)
+ (s.sales amount * (.35 * e.bonus)) AS CALC_VALUE FROM employees e, sales s WHERE e.employee_id = s.emp_id;
What will happen if you remove all the parentheses from the calculation?

A) There will be no difference in the value displayed in the CALC_VALUE column.
B) An error will be reported.
C) The value displayed in the CALC_VALUE column will be lower.
D) The value displayed in the CALC_VALUE column will be higher.

3. Which is an iSQL*Plus command?

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

4. You need to create a table named ORDERS that contain four columns:
1.an ORDER_ID column of number data type
2.a CUSTOMER_ID column of number data type
3.an ORDER_STATUS column that contains a character data type
4.a DATE_ORDERED column to contain the date the order was placed.
When a row is inserted into the table, if no value is provided when the order was placed,
today's date should be used instead.
Which statement accomplishes this?

A) CREATE TABLE orders (
order_id NUMBER (10),
customer_id NUMBER (8),
order_status VARCHAR2 (10),
date_ordered DATE DEFAULT SYSDATE);
B) CREATE TABLE orders (
order_id NUMBER (10),
customer_id NUMBER (8),
order_status NUMBER (10),
date_ordered DATE DEFAULT SYSDATE);
C) CREATE OR REPLACE TABLE orders (
order_id NUMBER (10),
customer_id NUMBER (8),
order_status VARCHAR2 (10),
date_ordered DATE DEFAULT SYSDATE);
D) CREATE TABLE orders (
order_id NUMBER (10),
customer_id NUMBER (8),
order_status VARCHAR2 (10),
date_ordered DATE = SYSDATE);
E) CREATE TABLE orders (
order_id NUMBER (10),
customer_id NUMBER (8),
order_status NUMBER (10),
date_ordered DATE = SYSDATE);
F) CREATE OR REPLACE TABLE orders (
order_id NUMBER (10),
customer_id NUMBER (8),
order_status VARCHAR2 (10),
date_ordered DATE = SYSDATE);

5. Examine the data in the EMPLOYEES table:

Which three subqueries work? (Choose three)

A) SELECT distinct department_id
FROM employees
Where salary > ANY (SELECT AVG(salary)
FROM employees
GROUP BY department_id);
B) SELECT department_id
FROM employees
WHERE salary > ALL (SELECT AVG(salary)
FROM employees
GROUP BY AVG(SALARY));
C) SELECT department_id
FROM employees
WHERE SALARY > ALL (SELECT AVG(salary)
FROM employees
GROUP BY department_id);
D) SELECT last_name
FROM employees
Where salary > ANY (SELECT MAX(salary)
FROM employees
GROUP BY department_id);
E) SELECT *
FROM employees
WHERE salary = (SELECT AVG(salary)
FROM employees
GROUP BY department_id);
F) SELECT *
FROM employees
where salary > (SELECT MIN(salary)
FROM employees
GROUP BY department.id);

Solutions: