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Updated: Jun 04, 2026
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Oracle Introduction to Oracle9i: SQL Sample Questions:
1. Which SQL statement would you use to remove a view called EMP_DEPT_VU from your schema?
A) REMOVE VIEW emp_dept_vu;
B) DELETE emp_dept_vu;
C) DROP VIEW emp_dept_vu;
D) REMOVE emp_dept_vu;
E) DROP emp_dept_vu;
F) DELETE VIEW emp_dept_vu;
2. Which are iSQL*Plus commands? (Choose all that apply.)
A) DESCRIBE
B) SELECT
C) DELETE
D) RENAME
E) UPDATE
F) INSERT
3. 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.
4. Examine the description of the EMPLOYEES table:
EMP_ID NUMBER(4) NOT NULL
LAST_NAME VARCHAR2(30) NOT NULL
FIRST_NAME VARCHAR2(30)
DEPT_ID NUMBER(2)
Which statement produces the number of different departments that have employees with last name Smith?
A) SELECT COUNT(*) FROM employees WHERE last_name='Smith';
B) SELECT COUNT(DISTINCT dept_id) FROM employees WHERE last_name='Smith';
C) SELECT UNIQUE(dept_id) FROM employees WHERE last_name='Smith';
D) SELECT DISTINCT(COUNT(dept_id)) FROM employees WHERE last_name='Smith';
E) SELECT COUNT (dept_id) FROM employees WHERE last_name='Smith';
5. STUDENT_ID NUMBER(12)
SEMESTER_END DATE
GPA NUMBER(4,3)
Which statement finds the highest grade point average (GPA) per semester?
A) SELECT MAX(gpa) GROUP BY semester_end WHERE gpa IS NOT NULL FROM student_grades;
B) SELECT MAX(gpa) FROM student_grades GROUP BY semester_end WHERE gpa IS NOT NULL;
C) SELECT MAX(gpa) FROM student_grades WHERE gpa IS NOT NULL;
D) SELECT (gpa) FROM student_grades GROUP BY semester_end WHERE gpa IS NOT NULL;
E) SELECT MAX(gpa) FROM student_grades WHERE gpa IS NOT NULL GROUP BY semester_end;
Solutions:
| Question # 1 Answer: C | Question # 2 Answer: A | Question # 3 Answer: B | Question # 4 Answer: B | Question # 5 Answer: E |
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