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Oracle Introduction to Oracle9i: SQL Sample Questions:

1. 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 E
B) Option D
C) Option B
D) Option C
E) Option A

2. The EMPLOYEES table contains these columns:

You need to write a query that will produce these results:
1.Display the salary multiplied by the commission_pct.
2.Exclude employees with a zero commission_pct.
3.Display a zero for employees with a null commission value.
Evaluate the SQL statement:
SELECT LAST_NAME, SALARY*COMMISSION_PCT
FROM EMPLOYEES
WHERE COMMISSION_PCT IS NOT NULL;
What does the statement provide?

A) An error statement
B) One of the desired results
C) All of the desired results
D) Two of the desired results

3. What is true about sequences?

A) The minimum value of an ascending sequence defaults to 1.
B) A sequence always increments by 1.
C) The start value of the sequence is always 1.
D) The maximum value of descending sequence defaults to 1.

4. Which best describes an inline view?

A) a subquery that is part of the FROM clause of another query
B) another name for a view that contains group functions
C) a schema object
D) a subquery that can contain an ORDER BY clause

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

A) No privileges.
B) All the privileges of a default user.
C) Only the SELECT privilege.
D) Only the CONNECT privilege.

Solutions: