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Oracle Introduction to Oracle9i: SQL Sample Questions:

1. Evaluate this SQL statement:
SELECT e.emp_name, d.dept_name
FROM employees e
JOIN departments d
USING (department_id)
WHERE d.department_id NOT IN (10,40)
ORDER BY dept_name;
The statement fails when executed. Which change fixes the error?

A) remove the table alias prefix from the WHERE clause
B) remove the ORDER BY clause
C) prefix the column in the USING clause with the table alias
D) remove the table alias from the SELECT clause
E) prefix the column in the ORDER BY clause with the table alias
F) replace the condition
"d.department_id NOT IN (10,40)"
in the WHERE clause with
"d.department_id <> 10 AND d.department_id <> 40"

2. Which four are correct guidelines for naming database tables? (Choose four)

A) Must begin with either a number or a letter.
B) Must be 1-30 characters long.
C) Must contain only A-Z, a-z, 0-9, _, $, and #.
D) Must begin with a letter.
E) Should not be an Oracle Server reserved word.
F) Must contain only A-Z, a-z, 0-+, _, *, and #.

3. In which two cases would you use an outer join? (Choose two.)

A) The tables being joined have NOT NULL columns.
B) The tables being joined have both matched and unmatched data.
C) Only when the tables have a primary key/foreign key relationship.
D) The columns being joined have NULL values.
E) The tables being joined have only matched data.
F) The tables being joined have only unmatched data.

4. What is true about the WITH GRANT OPTION clause?

A) It is required syntax for object privileges.
B) It allows privileges on specified columns of tables.
C) It allows the grantee to grant object privileges to other users and roles.
D) It allows a grantee DBA privileges.
E) It is used to grant an object privilege on a foreign key column.

5. Which SELECT statement should you use to extract the year from the system date and display it in the format "1998"?

A) SELECT DECODE(SUBSTR(SYSDATE, 8), 'YYYY') FROM dual;
B) SELECT TO_CHAR(SYSDATE,'yyyy') FROM dual;
C) SELECT TO_DATE(SYSDATE,'yyyy') FROM dual;
D) SELECT DECODE(SUBSTR(SYSDATE, 8), 'year') FROM dual;
E) SELECT TO_CHAR(SUBSTR(SYSDATE, 8,2),'yyyy') FROM dual;

Solutions: