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Oracle Introduction to Oracle9i: SQL Sample Questions:

1. The STUDENT_GRADES table has these columns:
STUDENT_ID NUMBER (12)
SEMESTER_END DATE
GPA NUMBER (4,3)
The register has requested a report listing the students' grade point averages (GPA), sorted from highest grade point average to lowest within each semester, starting from the earliest date. Which statement accomplishes this?

A) SELECT student_id, semester_end, gpa FROM student_grades ORDER BY semester_end, gpa DESC;
B) SELECT student_id, semester_end, gpa FROM student_grades ORDER BY semester_end ASC, gpa ASC;
C) SELECT student_id, semester_end, gpa FROM student_grades ORDER BY gpa DESC, semester_end DESC;
D) SELECT student_id, semester_end, gpa FROM student_grades ORDER BY gpa DESC, semester_end ASC;
E) SELECT student_id, semester_end, gpa FROM student_grades ORDER BY semester_end DESC, gpa DESC;

2. Evaluate the SQL statement:
SELECT LPAD (salary,10,'*')
FROM EMP
WHERE EMP_ID = 1001;
If the employee with the EMP_ID 1001 has a salary of 17000, what is displayed?

A) ****170.00
B) an error statement
C) 17000*****
D) **17000.00
E) 17000.00

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

4. Which four are valid Oracle constraint types? (Choose four.)

A) CONSTANT
B) NONUNIQUE
C) PRIMARY KEY
D) NOT NULL
E) UNIQUE
F) CASCADE
G) CHECK

5. What is true about sequences?

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

Solutions: