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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. Which are iSQL*Plus commands? (Choose all that apply.)

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

3. The EMPLOYEE tables have these columns:

You want to display the name and annual salary multiplied by the commission_pct for all employees. For records that have a NULL commission_pct, a zero must be displayed against the calculated column.
Which SQL statement displays the desired results?

A) SELECT last_name, (salary * 12) * IFNULL(commission_pct, 0) FROM EMPLOYEES;
B) SELECT last_name, (salary * 12) * commission_pct FROM EMPLOYEES;
C) SELECT last_name, (salary * 12) * NVL(commission_pct, 0) FROM EMPLOYEES;
D) SELECT last_name, (salary * 12) * NVL2(commission_pct, 0) FROM EMPLOYEES;

4. You want to display the titles of books that meet these criteria:
1.Purchased before January 21, 2001
2.Price is less then $500 or greater than $900
You want to sort the results by their data of purchase, starting with the most recently
bought book.
Which statement should you use?

A) SELECT book_title
FROM books
WHERE price < 500 or > 900
AND purchase_date < '21-JAN-2001'
ORDER BY purchase date DESC;
B) SELECT book_title
FROM books
WHERE price between 500 and 900
AND purchase_date < '21-JAN-2001'
ORDER BY purchase_date;
C) SELECT book_title
FROM books
WHERE price IN (500,900)
AND purchase_date < '21-JAN-2001'
ORDER BY purchase date ASC;
D) SELECT book_title
FROM books
WHERE (price < 500 OR price > 900)
AND purchase_date < '21-JAN-2001'
ORDER BY purchase date DESC;

5. Which two statements about creating constraints are true? (Choose two)

A) All constraints must be defines at the column level.
B) Constraint names must start with SYS_C.
C) Constraints can be created at the same time the table is created.
D) Information about constraints is found in the VIEW_CONSTRAINTS dictionary view.
E) Constraints can be created after the table is created.

Solutions: