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IBM DB2 9 Family Fundamentals Sample Questions:

1. Given the following requirements:
Create a table to contain employee data, with a unique numeric identifier automatically assigned when a row is added, has an EDLEVEL column that permits only the values 'C', 'H' and 'N', and permits inserts only when a corresponding value for the employee's department exists in the DEPARTMENT table.
Which of the following CREATE statements will successfully create this table?

A) CREATE TABLEemp (
empno SMALLINT NEXTVAL GENERATED BY DEFAULT AS IDENTITY,
firstname VARCHAR(30) NOT NULL,
lastname VARCHAR(30) NOT NULL,
workdept CHAR(3) NOT NULL,
edlevel CHAR(1) CHECK IN ('C','H','N')),
CONSTRAINT emp_pk PRIMARY KEY (empno),
CONSTRAINT emp_workdept_fk FOREIGN KEY department (deptno) REFERENCES
(workdept)
);
B) CREATE TABLEemp (
empno SMALLINT NEXTVAL GENERATED ALWAYS AS IDENTITY,
firstname VARCHAR(30) NOT NULL,
lastname VARCHAR(30) NOT NULL,
workdept CHAR(3) NOT NULL,
edlevel CHAR(1),
PRIMARY KEY emp_pk (empno),
FOREIGN KEY emp_workdept_fk ON (workdept) REFERENCES department (deptno),
CHECK edlevel_ck VALUES (edlevel IN ('C','H','N')),
);
C) CREATE TABLEemp (
empno SMALLINT NOT NULL GENERATED BY DEFAULT AS IDENTITY,
firstname VARCHAR(30) NOT NULL,
lastname VARCHAR(30) NOT NULL,
workdept CHAR(3),
edlevel CHAR(1),
CONSTRAINT emp_pk PRIMARY KEY (empno),
CONSTRAINT emp_workdept_fk FOREIGN KEY (workdept) REFERENCES department
(deptno),
CONSTRAINT edlevel_ck CHECK (edlevel IN ('C','H','N'))
);
D) CREATE TABLEemp (
empno SMALLINT NOT NULL GENERATED BY DEFAULT AS IDENTITY,
firstname VARCHAR(30) NOT NULL,
lastname VARCHAR(30) NOT NULL,
workdept CHAR(3),
edlevel CHAR(1),
CONSTRAINT emp_pk PRIMARY KEY (empno),
CONSTRAINT emp_workdept_fk FOREIGN KEY (workdept) REFERENCES department
(deptno),
CONSTRAINT edlevel_ck CHECK edlevel VALUES ('C','H','N')
);

2. Which of the following DB2 UDB isolation levels will only lock rows during read processing if another transaction tries to drop the table the rows are being read from?

A) Repeatable Read
B) Uncommitted Read
C) Read Stability
D) Cursor Stability

3. Given the following table:
TEMP_DATA
TEMP DATE
45 12/25/2006 51 12/26/2006 67 12/27/2006 72 12/28/2006 34 12/29/2006 42 12/30/2006
And the following SQL statement:
CREATE FUNCTION degf_to_c (temp INTEGER) RETURNS INTEGER LANGUAGE SQL CONTAINS SQL NO EXTERNAL ACTION DETERMINISTIC BEGIN ATOMIC DECLARE newtemp INTEGER; SET newtemp = temp - 32; SET newtemp = newtemp * 5; RETURN newtemp / 9; END
Which two of the following SQL statements illustrate the proper way to invoke the scalar function DEGF_TO_C?

A) VALUESdegf_to_c(32)
B) CALLdegf_to_c(32)
C) SELECT date,degf_to_c(temp) AS temp_c FROM temp_data
D) VALUESdegf_to_c(32) AS temp_c
E) SELECT * FROMTABLE(degf_to_c(temp)) AS temp_c

4. Which of the following privileges permits a user to update the comment on a sequence?

A) CONTROL
B) USAGE
C) ALTER
D) UPDATE

5. The following SQL statements were executed in sequence:
CREATE DISTINCT TYPE salary AS decimal(7,2) WITH COMPARISONS;
CREATE TABLE staffsalary(empid INT, empsalary salary);
INSERT INTO staffsalary VALUES (10, 50000), (20, 50000.00);
UPDATE staffsalary SET empsalary = 60000
WHERE salary(50000) = empsalary;
What is the current content of the staffsalary table?

A) ID | EMPSALARY ----------------- 10 | 60000.00 20 | 60000.00 ----------------
B) ID | EMPSALARY ----------------- 10 | 60000.00 20 | 50000.00 ----------------
C) ID | EMPSALARY ----------------- 10 | 60000 20 | 50000.00 ----------------
D) ID | EMPSALARY ----------------- 10 | 50000.00 20 | 50000.00 ----------------

Solutions: