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Oracle 1Z0-007 Exam Syllabus Topics:

Oracle Introduction to Oracle9i: SQL Sample Questions:

1. You need to produce a report for mailing labels for all customers. The mailing label must have only the customer name and address. The CUSTOMERS table has these columns:

Which SELECT statement accomplishes this task?

A) SELECT cust_name, cust_address FROM customers;
B) SELECT* FROM customers;
C) SELECT cust_id, cust_name, cust_address, cust_phone FROM customers;
D) SELECT name, address FROM customers;
E) SELECT id, name, address, phone FROM customers;

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. Examine the structure of the EMPLOYEES and NEW_EMPLOYEES tables:

Which DELETE statement is valid?

A) DELETE * FROM employees
WHERE employee_id IN (SELECT employee_id
FROM new_employees
WHERE name = 'Carrey');
B) DELETE FROM employees
WHERE employee_id = (SELECT employee_id FROM employees);
C) DELETE FROM employees
WHERE employee_id IN (SELECT employee_id
FROM new_employees
WHERE name = 'Carrey');
D) DELETE * FROM employees
WHERE employee_id=(SELECT employee_id FROM new_employees);

4. You need to change the definition of an existing table. The COMMERCIALS table needs its DESCRIPTION column changed to hold varying length characters up to 2000 bytes. The column can currently hold 1000 bytes per value. The table contains 20000 rows.
Which statement is valid?

A) ALTER TABLE commercials
MODIFY (description VARCHAR2(2000));
B) You cannot increase the size of a column if the table has rows.
C) ALTER TABLE commercials
CHANGE (description VARCHAR2(2000));
D) ALTER TABLE commercials
CHANGE (description CHAR2(2000));
E) ALTER TABLE commercials
MODIFY (description CHAR2(2000));

5. Which statement explicitly names a constraint?

A) ALTER TABLE student_grades ADD FOREIGN KEY (student_id) REFERENCES students(student_id);
B) ALTER TABLE student_grades ADD NAMED CONSTRAINT student_id_fk FOREIGN KEY (student_id) REFERENCES students(student_id);
C) ALTER TABLE student_grades ADD CONSTRAINT NAME = student_id_fk FOREIGN KEY (student_id) REFERENCES students(student_id);
D) ALTER TABLE student_grades ADD CONSTRAINT student_id_fk FOREIGN KEY (student_id) REFERENCES students(student_id);
E) ALTER TABLE student_grades ADD NAME student_id_fk FOREIGN KEY (student_id) REFERENCES students(student_id);

Solutions: