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IBM Assessment: DB2 9 Family Fundamentals Sample Questions:

1. Which of the following queries will correctly return the manager information sorted by the manager's last name, department and project name?

A) SELECTlastname, dept, projname, manager, startdate FROM (SELECT name AS lastname, dept, proj AS projname, manager, startdate FROM employee, project WHERE empno = mgrno) AS empproj SORT BY lastname, firstname, dept, projname
B) SELECTlastname, dept, projname, manager, startdate FROM (SELECT name, dept, proj AS projname, manager, startdate FROM employee, project WHERE empno = empno) AS empproj ORDER BY name, dept, projname
C) SELECTlastname, dept, projname, manager, startdate FROM (SELECT name AS lastname, dept, proj AS projname, manager, startdate FROM employee, project WHERE empno = mgrno) AS empproj ORDER BY lastname, dept, projname
D) SELECTlastname, dept, projname, manager, startdate FROM (SELECT name AS lastname, dept, proj AS projname, manager, startdate FROM employee, project WHERE empno = mgrno) AS empproj ORDER BY lastname ASC SORT BY dept, projname DESC

2. Given the following table:
TAB1
COL1 COL2
A 10 B 20 C 30
D 40
E 50
And the following SQL statements:
DECLARE c1 CURSOR WITH HOLD FOR
SELECT * FROM tab1 ORDER BY col_1;
OPEN c1;
FETCH c1;
FETCH c1;
FETCH c1;
COMMIT;
FETCH c1;
CLOSE c1;
FETCH c1;
Which of the following is the last value obtained for COL_2?

A) 50
B) 20
C) 40
D) 30

3. Given the following statement:
SELECT hyear, AVG(salary)
FROM (SELECT YEAR(hiredate) AS hyear, salary
FROM employee WHERE salary > 30000)
GROUP BY hyear
Which of the following describes the result if this statement is executed?

A) The statement will return the year and average salary for all years that every employee hired had a salary greater than $30,000.
B) The statement will return the year and average salary for all employees that have a salary greater than $30,000, sorted by year.
C) The statement will return the year and average salary for all years that any employee had a salary greater than $30,000.
D) The statement will return the year and average salary for all employees hired within a given year that have a salary greater than $30,000.

4. A view is created with the following statement:
CREATE VIEW v1 AS SELECT col1, col2, col3, col4 FROM t1 WHERE col4 > 1000 WITH CHECK OPTION
What is the effect of the CHECK OPTION clause?

A) Any row inserted or updated through view V1 must meet the condition that col4 > 1000 and no row in table T1 can be updated such that col4 <= 1000, but new rows in the table can be inserted with col4 <= 1000.
B) From now on, any row inserted or updated in table T1 must meet the condition that col4 > 1000, but existing rows in the table are not checked.
C) Any row inserted or updated through view V1 must meet the condition that col4 > 1000.
D) At view creation, DB2 will check the data in table T1, and if in any row doesn't meet the condition col4 > 1000, the view creation will be rejected.

5. Which of the following statements eliminates all but one of each set of duplicate rows in the DEPT column in the STAFF table?

A) SELECT (dept) DISTINCT FROM staff
B) SELECT (dept) UNIQUE FROM staff
C) SELECT UNIQUE dept FROM staff
D) SELECT DISTINCT dept FROM staff

Solutions: