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Oracle 1Z0-007 Exam Syllabus Topics:

Oracle Introduction to Oracle9i: SQL Sample Questions:

Question 1

You define a multiple-row subquery in the WHERE clause of an SQL query with a comparison operator "=".
What happens when the main query is executed?

A. You cannot define a multiple-row subquery in the WHERE clause of a SQL query.
B. The main query fails because the multiple-row subquery cannot be used with the comparison operator.
C. The main query executes with the first value returned by the subquery.
D. The main query executes with all the values returned by the subquery.
E. The main query executes with the last value returned by the subquery.

Question 2

Management has asked you to calculate the value 12*salary* commission_pct for all the employees in the EMP table. The EMP table contains these columns:

Which statement ensures that a value is displayed in the calculated columns for all employees?

A. SELECT last_name, 12*salary* commission_pct FROM emp;
B. SELECT last_name, 12*salary*(nvl(commission_pct,0)) FROM emp;
C. SELECT last_name, 12*salary*(decode(commission_pct,0)) FROM emp;
D. SELECT last_name, 12*salary* (commission_pct,0) FROM emp;

Question 3

You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty.
Which statement accomplishes this task?

A. ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student_id);
B. ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY student_id;
C. ALTER TABLE studentsMODIFY CONSTRAINT stud_id_pk PRIMARY KEY (student_id);
D. ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY (student_id);
E. ALTER TABLE students ADD PRIMARY KEY student_id;

Question 4

The EMPLOYEES table contains these columns:
EMPLOYEE_ID NUMBER(4)
LAST_NAME VARCHAR2 (25)
JOB_ID VARCHAR2(10)
You want to search for strings that contain 'SA_' in the JOB_ID column. Which SQL statement do you use?

A. SELECT employee_id, last_name, job_id FROM employees WHERE job_id = '%SA_';
B. SELECT employee_id, last_name, job_id FROM employees WHERE job_id LIKE '%SA_' ESCAPE "\";
C. SELECT employee_id, last_name, job_id FROM employees WHERE job_id LIKE '%SA_';
D. SELECT employee_id, last_name, job_id FROM employees WHERE job_id LIKE '%SA\_%' ESCAPE '\';

Question 5

The STUDENT_GRADES table has these columns
STUDENT_ID NUMBER(12)
SEMESTER_END DATE
GPA NUMBER(4,3)
Which statement finds students who have a grade point average (GPA) greater than 3.0 for the calendar year 2001?

A. SELECT student_id, gpa
FROM student_grades
WHERE semester_end BETWEEN '01-JAN-2001' AND '31-DEC-2001'
OR gpa > 3.0;
B. SELECT student_id, gpa
FROM student_grades
WHERE semester_end BETWEEN '01-JAN-2001' AND '31-DEC-2001'
AND gpa gt 3.0;
C. SELECT student_id, gpa
FROM student_grades
WHERE semester_end BETWEEN '01-JAN-2001' AND '31-DEC-2001'
OR gpa > 3.;
D. SELECT student_id, gpa
FROM student_grades
WHERE semester_end > '01-JAN-2001' OR semester_end < '31-DEC-2001' AND gpa >= 3.0;
E. SELECT student_id, gpa
FROM student_grades
WHERE semester_end BETWEEN '01-JAN-2001' AND '31-DEC-2001'
AND gpa > 3.0;

Solutions: