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Oracle Introduction to Oracle9i: SQL Sample Questions:

1. Which two statements accurately describe a role? (Choose two.)

A) Privileges are given to a role by using the CREATE ROLE statement.
B) A user can have access to a maximum of 10 roles.
C) A user can have access to several roles, and several users can be assigned the same role.
D) A role can be given to a maximum of 1000 users.
E) A role can have a maximum of 100 privileges contained in it.
F) A role is a named group of related privileges that can be granted to the user.

2. A SELECT statement can be used to perform these three functions:
1.Choose rows from a table.
2.Choose columns from a table
3.Bring together data that is stored in different tables by creating a link between them.
Which set of keywords describes these capabilities?

A) intersection, projection, join
B) selection, intersection, join
C) selection, projection, join
D) difference, projection, product
E) difference, projection, join

3. Which SQL statement defines the FOREIGN KEY constraint on the DEPTNO column of the EMP table?

A) CREATE TABLE EMP
(empno NUMBER(4),
ename VARCHAR2(35),
deptno NUMBER(7,2)
CONSTRAINT emp_deptno_fk REFERENCES dept (deptno));
B) CREATE TABLE EMP (empno NUMBER(4),
ename VARCHAR2(35),
deptno NUMBER(7,2) FOREIGN KEY
CONSTRAINT emp deptno fk REFERENCES dept (deptno));
C) CREATE TABLE EMP
(empno NUMBER(4),
ename VARCHAR2(35),
deptno NUMBER(7,2) NOT NULL
CONSTRAINT emp_deptno_fk FOREIGN KEY deptno
REFERENCES dept deptno);
D) CREATE TABLE EMP
(empno NUMBER(4)
ename VARCHAR2(35),
deptno NUMBER(7,2) NOT NULL,
CONSTRAINT emp_deptno_fk REFERENCES dept (deptno)
FOREIGN KEY (deptno));

4. Which statement describes the ROWID data type?

A) Character data up to 4 gigabytes.
B) Binary data up to 4 gigabytes.
C) A hexadecimal string representing the unique address of a row in its table.
D) Binary data stored in an external file, up to 4 gigabytes.
E) Raw binary data of variable length up to 2 gigabytes.

5. Examine the structure of the EMPLOYEES and NEW EMPLOYEES tables:

Which MERGE statement is valid?

A) MERGE new_employees c
USING employees e
ON (c.employee_id = e.employee_id)
WHEN EXIST THEN
UPDATE SET
B) name = e.first_name ||','|| e.last_name
WHEN NOT MATCHED THEN
INSERT VALUES(e.employee_id, e.first_name ||',
'||e.last_name);
C) name = e.first_name ||','|| e.last_name
WHEN NOT MATCHED THEN
INSERT INTO new_employees VALUES(e.employee_id, e.first_name ||'.'||e.last_name);
D) name = e.first_name ||','|| e.last_name
WHEN NOT MATCHED THEN
INSERT VALUES(e.employee_id, e.first_name ||',
'||e.last_name);
E) MERGE INTO new_employees c
USING employees e
ON (c.employee_id = e.employee_id)
WHEN MATCHED THEN
UPDATE SET
F) MERGE INTO new employees c
USING employees e
ON (c.employee_id = e.employee_id)
WHEN EXISTS THEN
UPDATE SET
G) name = e.first_name ||','|| e.last_name
WHEN NOT MATCHED THEN
INSERT VALUES(e.employee_id, e.first_name ||',
'||e.last_name);
H) MERGE new_employees c
FROM employees e
ON (c.employee_id = e.employee_id)
WHEN MATCHED THEN
UPDATE SET

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