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Oracle Introduction to Oracle9i: SQL Sample Questions:

1. Which is an iSQL*Plus command?

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

2. Examine the description of the MARKS table:

SUBJ1 and SUBJ2 indicate the marks obtained by a student in two subjects.
Examine this SELECT statement based on the MARKS table:
SELECT subj1+subj2 total_marks, std_id
FROM marks
WHERE subj1 > AVG (subj1) AND subj2 > AVG(subj2)
ORDER BY total_marks;
What is the result of the SELECT statement?

A) The statement returns an error at the WHERE clause.
B) The statement returns an error at the ORDER BY clause.
C) The statement executes successfully and returns the student ID and sum of all marks for each student who obtained more than the average mark in each subject.
D) The statement returns an error at the SELECT clause.

3. Evaluate these two SQL statements:
SELECT last_name, salary , hire_date
FROM EMPLOYEES
ORDER BY salary DESC;
SELECT last_name, salary, hire_date
FROM EMPLOYEES
ORDER BY 2 DESC;
What is true about them?

A) The two statements can be made to produce identical results by adding a column alias for the salary column in the second SQL statement.
B) There is no need to specify DESC because the results are sorted in descending order by default.
C) The second statement returns a syntax error.
D) The two statements produce identical results.

4. Which object privileges can be granted on a view?

A) ALTER, DELETE, INSERT, SELECT
B) none
C) DELETE, INSERT, SELECT, UPDATE
D) DELETE, INSERT,SELECT

5. The ORDERS table has these columns:

The ORDERS table tracks the Order number, the order total, and the customer to whom the Order belongs. Which two statements retrieve orders with an inclusive total that ranges between 100.00 and 2000.00 dollars? (Choose two.)

A) SELECT customer_id, order_id, order_total FROM orders WHERE order_total BETWEEN 100 and 2000;
B) SELECT customer_id, order_id, order_total FROM orders WHERE order_total >= 100 and <= 2000;
C) SELECT customer_id, order_id, order_total FROM orders RANGE ON order_total (100 AND 2000) INCLUSIVE;
D) SELECT customer_id, order_id, order_total FROM orders WHERE order_total >= 100 and order_total <= 2000;
E) SELECT customer_id, order_id, order_total FROM orders HAVING order_total BETWEEN 100 and 2000;

Solutions: