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Oracle Introduction to Oracle9i: SQL Sample Questions:

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

2. Examine the data from the ORDERS and CUSTOMERS tables.

Evaluate the SQL statement:
SELECT * FROM orders WHERE cust_id = (SELECT cust_id FROM customers WHERE cust_name = 'Smith');
What is the result when the query is executed?

A) Option C
B) Option A
C) Option D
D) Option B
E) Option E

3. Examine the statement:
Create synonym emp for hr.employees;
What happens when you issue the statement?

A) An error is generated.
B) You will have two identical tables in the HR schema with different names.
C) You create a table called employees in the HR schema based on you EMP table.
D) You create an alternative name for the employees table in the HR schema in your own schema.

4. What is true about sequences?

A) Once created, a sequence belongs to a specific schema.
B) Only the DBA can control which sequence is used by a certain table.
C) Once created, a sequence is automatically available to all users.
D) Once created, a sequence is automatically used in all INSERT and UPDATE statements.
E) Once created, a sequence is linked to a specific table.

5. The DBA issues this SQL command:
CREATE USER scott IDENTIFIED by tiger;
What privileges does the user Scott have at this point?

A) all the privileges of a default user
B) only the SELECT privilege
C) only the CONNECT privilege
D) no privileges

Solutions: