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Oracle Introduction to Oracle9i: SQL Sample Questions:

1. Which SQL statement displays the date March 19, 2001 in a format that appears as "Nineteenth of March 2001 12:00:00 AM"?

A) SELECT TO_CHAR(TO_DATE('19-Mar-2001', 'DD-Mon-YYYY), 'fmDdspth "of" Month YYYYfmtHH:HI:SS AM') NEW_DATE FROM dual;
B) SELECT TO_CHAR(TO_DATE('19-Mar-2001', 'DD-Mon-YYYY'), 'fmDdspth "of" Month YYYY HH:MI:SS AM') NEW_DATE FROM dual;
C) SELECT TO_CHAR(TO_DATE('19-Mar-2001', 'DD-Mon-YYYY'), 'Ddspth "of" Month YYYY fmHH:MI:SS AM') NEW_DATE FROM dual;
D) SELECT TO_CHAR(TO_DATE('19-Mar-2001', 'DD-Mon-YYYY'), 'fmDdspth "of" Month YYYY fmHH:MI:SS AM') NEW_DATE FROM dual;

2. Which three SELECT statements displays 2000 in the format "$2,000.00"? (Choose three)

A) SELECT TO CHAR (2000,'$#,###.##') FROM dual;
B) SELECT TO CHAR (2000, '$9,999.00') FROM dual;
C) SELECT TO CHAR (2000, '$2,000.00') FROM dual;
D) SELECT TO CHAR (2000, '$N,NNN.NN') FROM dual;
E) SELECT TO CHAR (2000, '$9,999.99') FROM dual;
F) SELECT TO CHAR (2000, '$0,000.00') FROM dual;

3. Which two statements about subqueries are true? (Choose two.)

A) A single row subquery cannot be used in a condition where the LIKE operator is used for comparison.
B) A multiple-row subquery cannot be used in a condition where the LIKE operator is used for comparison.
C) A SQL query statement can display data from table B that is referred to in its subquery, without including table B in its own FROM clause.
D) A single row subquery can retrieve data from more than one table.
E) A SQL query statement cannot display data from table B that is referred to in its subquery, unless table B is included in the main query's FROM clause.
F) A single row subquery can retrieve data from only one table.

4. 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 (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';
B) 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);
C) 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;
D) 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;
E) 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;

5. Examine the structure if the EMPLOYEES table:

You need to create a view called EMP_VU that allows the user to insert rows through the view. Which SQL statement, when used to create the EMP_VU view, allows the user to insert rows?

A) CREATE VIEW emp_Vu AS
SELECT employee_id, emp_name, job_id,
DISTINCT department_id
FROM employees;
B) CREATE VIEW emp_Vu AS
SELECT employee_id, emp_name,
department_id
FROM employees
WHERE mgr_id IN (102, 120);
C) CREATE VIEW emp_Vu AS
SELECT department_id, SUM(sal) TOTALSAL
FROM employees
WHERE mgr_id IN (102, 120)
GROUP BY department_id;
D) CREATE VIEW emp_Vu AS
SELECT employee_id, emp_name, job_id
department_id
FROM employees
WHERE mgr_id IN (102, 120);

Solutions: