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IBM DB2 9 Family Fundamentals Sample Questions:

1. A DBA has been asked to create a table which will contain a substantial amount of detailed sales information for each calendar month and maintain it to contain only the last 12 months. Which of the following methods will facilitate the online removal of the oldest month's data?

A) Create a range partitioned table, partitioned by month, and use the ALTER TABLE statement to detach the oldest month and attach storage for new data.
B) Create 12 separate tables, create a view based on all 12, drop the table with the oldest month's data then drop and re-create the view.
C) Create a single table, extract the data to be retained using UNLOAD with a SELECT statement, drop and re-create the table then load only the data to be retained.
D) Create an MQT that selects the oldest month of data with the REFRESH IMMEDIATE option.

2. An index named EMPID_X exists for a table named EMPLOYEE. Which of the following will allow user USER1 to drop the EMPID_X index?

A) GRANT INDEX ON TABLE employee TO user1
B) GRANT DELETE ON INDEXempid_x TO user1
C) GRANT DROP ON INDEXempid_x TO user1
D) GRANT CONTROL ON INDEXempid_x TO user1

3. Given the following table definitions:
EMPLOYEES
EMPID INTEGER
NAME CHAR(20)
DEPTID CHAR(3)
SALARY DECIMAL(10,2)
COMMISSION DECIMAL(8,2)
DEPARTMENTS
DEPTNO INTEGER DEPTNAME CHAR(20)
Which of the following statements will produce a result data set that satisfies all of these conditions:
> Displays the total number of employees in each department >> Displays the corresponding department name for each department ID >> Sorted by department employee count, from greatest to least

A) SELECTdeptname, COUNT(empno) FROM departments, employees WHERE deptid = deptno GROUP BY deptname ORDER BY 2 DESC
B) SELECT *,COUNT(empno) FROM departments, employees WHERE deptid = deptno GROUP BY deptname ORDER BY 2 DESC
C) SELECTdeptname, COUNT(empno) FROM departments, employees WHERE deptid = deptno GROUP BY deptname ORDER BY 2 ASC
D) SELECTdeptname, COUNT(*) FROM departments, employees WHERE deptid = deptno GROUP BY deptname ORDER BY 2

4. Given the following tables:
TABLEA
EMPIDNAME
1 USER1 2 USER2
TABLEB
EMPID WEEKNO PAYAMT
1 1 1000.00
1 2 1000.00
2 1 2000.00
and the fact that TABLEB was defined as follows:
CREATE TABLE tableb (empid SMALLINT,
weekno SMALLINT,
payamt DECIMAL(6,2),
CONSTRAINT const1 FOREIGN KEY (empid)
REFERENCES tablea(empid)
ON DELETE NO ACTION)
If the following command is issued:
DELETE FROM tablea WHERE empid=2
How many rows will be deleted from TABLEA and TABLEB?

A) TABLEA - 1, TABLEB - 0
B) TABLEA - 1, TABLEB - 1
C) TABLEA - 0, TABLEB - 0
D) TABLEA - 0, TABLEB - 1

5. Given the following two tables:
NAMES
NAME NUMBER
Wayne Gretzky 99 Jaromir Jagr 68 Bobby Orr 4 Bobby Hull 23 Mario Lemieux 66
POINTS
NAME POINTS
Wayne Gretzky 244 Bobby Orr 129 Brett Hull 121 Mario Lemieux 189 Joe Sakic 94
How many rows would be returned using the following statement?
SELECT name FROM names, points

A) 25
B) 10
C) 5
D) 0

Solutions: