IBM DB2 C2090-730

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IBM DB2 9 Family Fundamentals Sample Questions:

1. Which of the following SQL statements will return the year and average salary for all employees hired within a given year that have a salary greater than $30,000?

A) SELECT * FROM t1 WHERE (c1,c2)= (SELECT c1,c2 FROM t2)
B) SELECT * FROM t1 INTERSECT SELECT * FROM t2
C) SELECT * FROM t1 UNION SELECT * FROM t2
D) SELECT * FROM t1 UNION DISTINCT SELECT * FROM t2

2. Given the following CREATE TABLE statement:
CREATE TABLE customer(custid INTEGER, info XML)
And the following INSERT statements:
INSERT INTO customer VALUES (1000,
'<customerinfo xmlns="http://custrecord.dat" custid="1000">
<name>John Doe</name>
<addr country="United States">
<street>25 East Creek Drive</street>
<city>Raleigh</city>
<state-prov>North Carolina</state-prov>
<zip-pcode>27603</zip-pcode>
</addr>
<phone type="work">919-555-1212</phone>
<email>[email protected]</email>
</customerinfo>');
INSERT INTO customer VALUES (1000,
'<customerinfo xmlns="http://custrecord.dat" custid="1001">
<name>Paul Smith</name>
<addr country="Canada">
<street>412 Stewart Drive</street>
<city>Toronto</city>
<state-prov>Ontario</state-prov>
<zip-pcode>M8X-3T6</zip-pcode>
</addr>
<phone type="work">919-555-4444</phone>
<email>[email protected]</email>
</customerinfo>');
What is the result of the following XQuery expression?
XQUERY declare default element namespace "http://custrecord.dat"; for
$info in db2-fn:xmlcolumn('CUSTOMER.INFO')/customerinfo where
$info/addr/state-prov="Ontario" return $info/name/text();

A) <customerinfo xmlns="http://custrecord.dat" custid="1001"><name xmlns="http://custrecord.dat">Paul Smith</name>
B) Paul Smith
C) <namexmlns="http://custrecord.dat">Paul Smith</name>
D) <customerinfo xmlns="http://custrecord.dat" custid="1001">Paul Smith</customerinfo>

3. 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) 0
D) 5

4. Given the following table:
EMPLOYEE
EMPID NAME INSTRUMENT
1 Jagger, Mick 01
2 Richards, Keith 02
3 Wood, Ronnie 02
4 Watts, Charlie 03
5 Jones, Darryl 04
6 Leavell, Chuck 05
If the following query is executed:
SELECT name,
CASE WHEN instrument = '01' THEN 'HARMONICA'
WHEN instrument = '02' THEN 'GUITAR'
WHEN instrument = '03' THEN 'DRUMS'
ELSE 'UNKNOWN'
END AS instrument
FROM employee
What will be the results?

A) NAME INSTRUMENT
Jagger, Mick HARMONICA Richards, Keith GUITAR Wood, Ronnie GUITAR Watts, Charlie DRUMS Jones, Darryl ERROR Leavell, Chuck ERROR
B) NAME INSTRUMENT
Jagger, Mick HARMONICA Richards, Keith GUITAR Wood, Ronnie GUITAR Watts, Charlie DRUMS Jones, Darryl UNKNOWN Leavell, Chuck UNKNOWN
C) NAME INSTRUMENT
Jagger, Mick HARMONICA Richards, Keith GUITAR Wood, Ronnie GUITAR Watts, Charlie DRUMS Jones, Darryl 04 Leavell, Chuck 05
D) NAME INSTRUMENT
Jagger, Mick HARMONICA Richards, Keith GUITAR Wood, Ronnie GUITAR Watts, Charlie DRUMS Jones, Darryl -Leavell, Chuck

5. Which of the following will be a consequence of defining the column IDCOL2 in TABLE2 as a foreign key referencing the primary key (IDCOL1) of TABLE1?

A) When inserting a row in TABLE2, DB2 will only allow foreign values forIDCOL2, that is values which do not exist in IDCOL1.
B) DB2 will no longer allow updating the value of IDCOL1 in TABLE1.
C) When a SELECT statement joins TABLE1 with TABLE2, DB2 will automatically add the condition TABLE1.IDCOL1=TABLE2.IDCOL2 if not specified in the statement.
D) When inserting a row in TABLE2, the only values that DB2 will allow for IDCOL2 are the existing values of IDCOL1.

Solutions:

Question # 1 Answer: D

Question # 2 Answer: D

Question # 3 Answer: A

Question # 4 Answer: B

Question # 5 Answer: D