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Oracle Introduction to Oracle9i: SQL Sample Questions:

1. Examine the structure of the STUDENTS table:

You need to create a report of the 10 students who achieved the highest ranking in the course INT SQL and who completed the course in the year 1999.
Which SQL statement accomplishes this task?

A) SELECT student_ id, marks, ROWNUM "Rank"
FROM students
WHERE ROWNUM <= 10
AND finish_date BETWEEN '01-JAN-99' AND '31-DEC-99
AND course_id = 'INT_SQL'
ORDER BY marks DESC;
B) SELECT student id, marks, ROWNUM "Rank"
FROM (SELECT student_id, marks
FROM students
ORDER BY marks)
WHERE ROWNUM <= 10
AND finish date BETWEEN '01-JAN-99' AND '31-DEC-99'
AND course_id = 'INT_SQL';
C) SELECT student_id, marks, ROWNUM "Rank"
FROM (SELECT student_id, marks
FROM students
WHERE ROWNUM <= 10
AND finish_date BETWEEN '01-JAN-99' AND '31-DEC-
99'
AND course_id = 'INT_SQL'
ORDER BY marks DESC);
D) SELECT student_id, marks, ROWNUM "Rank"
FROM (SELECT student_id, marks
FROM students
WHERE (finish_date BETWEEN '01-JAN-99 AND '31-DEC-99'
AND course_id = 'INT_SQL'
ORDER BY marks DESC)
WHERE ROWNUM <= 10;
E) SELECT student_id, marks, ROWID "Rank"
FROM students
WHERE ROWID <= 10
AND finish_date BETWEEN '01-JAN-99' AND '31-DEC-99'
AND course_id = 'INT_SQL'
ORDER BY marks;

2. 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 > 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 BETWEEN '01-JAN-2001' AND '31-DEC-2001'
AND gpa gt 3.0;
E) SELECT student_id, gpa
FROM student_grades
WHERE semester_end > '01-JAN-2001' OR semester_end < '31-DEC-2001' AND gpa >= 3.0;

3. Examine the statement:
Create synonym emp for hr.employees;
What happens when you issue the statement?

A) You create an alternative name for the employees table in the HR schema in your own schema.
B) You create a table called employees in the HR schema based on you EMP table.
C) You will have two identical tables in the HR schema with different names.
D) An error is generated.

4. Which four are attributes of single row functions? (Choose four.)

A) cannot be nested
B) manipulate data items
C) accept only one argument and return only one value
D) return one result per row
E) act on each row returned
F) accept arguments which can be a column or an expression

5. You are granted the CREATE VIEW privilege. What does this allow you to do?

A) Create a view in your schema.
B) Create a view in any schema.
C) Create a sequence view in any schema.
D) Create a view only of it is based on tables that you created.
E) Create a table view.
F) Create a view that is accessible by everyone.

Solutions: