Section
2 Quiz
(Answer all questions in this section)
1.
Which of the following are true?
(Choose Two) Mark for
Review
(1)
Points
(Choose all correct answers)
Character values are not case-sensitive
Date values are format-sensitive (*)
Date values are enclosed in single quotation marks (*)
Character strings are enclosed in double quotation marks
2.
Which of the following would be
returned by this SELECT statement:
SELECT
last_name, salary
FROM
employees
WHERE
salary < 3500;
Mark
for Review
(1)
Points
LAST_NAME
SALARY
King
5000
LAST_NAME
SALARY
Rajas
3500
LAST_NAME
SALARY
Davies
3100
(*)
All of
the above
3.
How can you write "not equal
to" in the WHERE-clause? Mark for
Review
(1)
Points
!=
^=
<>
All of the above (*)
4.
Which query would give the following
result?
LAST_NAME
FIRST_NAME DEPARTMENT_ID
King
Steven 90
Mark
for Review
(1)
Points
SELECT last_name, first_name, department_id
FROM
employees
WHERE
last_name LIKE 'k%';
SELECT last_name, first_name, department_id
FROM
employees
WHERE
last_name LIKE 'KING';
SELECT last_name, first_name, department_id
FROM
employees
WHERE
last_name = 'King';
(*)
SELECT last_name, first_name, department_id
FROM
employees C
WHERE
last_name = 'KING';
5.
Which SELECT statement will display
both unique and non-unique combinations of the MANAGER_ID and DEPARTMENT_ID
values from the EMPLOYEES table?
Mark for Review
(1)
Points
SELECT DISTINCT manager_id, department_id FROM employees;
SELECT manager_id, DISTINCT department_id FROM employees;
SELECT manager_id, department_id FROM employees; (*)
SELECT manager_id, department_id DISTINCT FROM employees;
6.
Where in a SQL statement can you not
use arithmetic operators? Mark for
Review
(1)
Points
WHERE
SELECT
NONE
FROM (*)
7.
Which clause would you include in a
SELECT statement to restrict the data returned to only the employees in
department 10? Mark for Review
(1)
Points
WHERE (*)
FROM
SELECT
IS
8.
The concatenation operator ... Mark
for Review
(1)
Points
Brings together columns or character strings into other columns
Creates a resultant column that is a character expression
Is represented by two vertical bars ( || )
All of the above (*)
9.
You need to display employees whose
salary is in the range of 30000 and 50000. Which comparison operator should you
use? Mark for Review
(1)
Points
LIKE
BETWEEN...AND... (*)
IN
IS NULL
10.
Which comparison condition would you use to
select rows that match a character pattern? Mark for Review
(1)
Points
LIKE (*)
IN
ALMOST
SIMILAR
11.
Which of the following WHERE clauses would not
select the number 10? Mark for Review
(1)
Points
WHERE hours <= 10
WHERE hours IN (8,9,10)
WHERE hours <>10 (*)
WHERE hours BETWEEN 10 AND 20
12.
When using the "LIKE" operator, the %
and _ symbols can be used to do a pattern-matching, wild card search. True or
False? Mark for Review
(1)
Points
True (*)
False
13.
Which of the following are examples of
comparison operators used in the WHERE clause? Mark for Review
(1)
Points
=, >, <, <=, >=, <>
between ___ and ___
in (..,..,.. )
like
is null
All of the above (*)
14.
If you write queries using the BETWEEN operator,
it does not matter in what order you enter the values, i.e. BETWEEN low value
AND high value will give the same result as BETWEEN high value and low value.
True or False? Mark for Review
(1)
Points
True
False (*)
15.
The EMPLOYEES table contains these columns:
LAST_NAME
VARCHAR2(25)
FIRST_NAME
VARCHAR2(25)
EMAIL
VARCHAR2(50)
You are
writing a SELECT statement to retrieve the names of employees that have an
email address.
SELECT
last_name||', '||first_name "Employee Name"
FROM
employees;
Which
WHERE clause should you use to complete this statement?
Mark
for Review
(1)
Points
WHERE email != NULL;
WHERE email IS NOT NULL; (*)
WHERE email = NULL;
WHERE email IS NULL;
1.
You need write a SELECT statement
that should only return rows that contain 34, 46, or 48 for the DEPARTMENT_ID
column. Which operator should you use in the WHERE clause to compare the
DEPARTMENT_ID column to this specific list of
values? Mark for Review
(1)
Points
BETWEEN..AND..
!=
=
IN (*)
2.
You want to retrieve a list of
customers whose last names begin with the letters 'Fr' . Which keyword should
you include in the WHERE clause of your SELECT statement to achieve the desired
result? Mark for Review
(1)
Points
IN
BETWEEN
AND
LIKE (*)
3.
Evaluate this SELECT statement:
SELECT *
FROM
employees
WHERE
department_id IN(10, 20, 30)
AND
salary > 20000;
Which
values would cause the logical condition to return TRUE?
Mark
for Review
(1)
Points
DEPARTMENT_ID = 20 and SALARY = 20000
DEPARTMENT_ID = 10 and SALARY = 20000
DEPARTMENT_ID = 10 and SALARY = 20001 (*)
DEPARTMENT_ID = null and SALARY = 20001
4.
How can you write "not equal
to" in the WHERE-clause? Mark for
Review
(1)
Points
!=
^=
<>
All of the above (*)
5.
Which of the following are true?
(Choose Two) Mark for
Review
(1)
Points
(Choose all correct answers)
Date values are enclosed in single quotation marks (*)
Character strings are enclosed in double quotation marks
Date values are format-sensitive (*)
Character values are not case-sensitive
6.
If you write queries using the
BETWEEN operator, it does not matter in what order you enter the values, i.e.
BETWEEN low value AND high value will give the same result as BETWEEN high
value and low value. True or False? Mark for Review
(1)
Points
True
False (*)
7.
The EMPLOYEES table contains these
columns:
LAST_NAME
VARCHAR2(25)
FIRST_NAME
VARCHAR2(25)
EMAIL
VARCHAR2(50)
You are
writing a SELECT statement to retrieve the names of employees that have an
email address.
SELECT
last_name||', '||first_name "Employee Name"
FROM
employees;
Which
WHERE clause should you use to complete this statement?
Mark
for Review
(1)
Points
WHERE email IS NOT NULL; (*)
WHERE email IS NULL;
WHERE email = NULL;
WHERE email != NULL;
8.
When using the "LIKE"
operator, the % and _ symbols can be used to do a pattern-matching, wild card
search. True or False? Mark for Review
(1)
Points
True (*)
False
9.
Which of the following WHERE clauses
would not select the number 10? Mark for Review
(1)
Points
WHERE hours <= 10
WHERE hours <>10 (*)
WHERE hours BETWEEN 10 AND 20
WHERE hours IN (8,9,10)
10.
Which two statements would select salaries that
are greater than or equal to 2500 and less than or equal to 3500? (Choose
two) Mark for Review
(1)
Points
(Choose all correct answers)
WHERE salary BETWEEN 3500 AND 2500
WHERE salary BETWEEN 2500 AND 3500 (*)
WHERE salary <=2500 AND salary >= 3500
WHERE salary >= 2500 AND salary <= 3500 (*)
11.
You need to display employees with salaries that
are at least 30000 or higher. Which comparison operator should you
use? Mark for Review
(1)
Points
"=>"
!=
>
>= (*)
12.
The concatenation operator ... Mark for Review
(1)
Points
Brings together columns or character strings into other columns
Creates a resultant column that is a character expression
Is represented by two vertical bars ( || )
All of the above (*)
13.
You need to display employees whose salary is in
the range of 30000 and 50000. Which comparison operator should you
use? Mark for Review
(1)
Points
BETWEEN...AND... (*)
IN
IS NULL
LIKE
14.
You need to display only unique combinations of
the LAST_NAME and MANAGER_ID columns in the EMPLOYEES table. Which keyword
should you include in the SELECT clause?
Mark for Review
(1)
Points
DISTINCTROW
ONLY
UNIQUEONE
DISTINCT (*)
15.
You need to display employees whose salary is in
the range of 10000 through 25000 for employees in department 50 . What does the
WHERE clause look like? Mark for Review
(1)
Points
WHERE department_id < 50
AND
salary BETWEEN 10000 AND 25000
WHERE department_id = 50
AND
salary BETWEEN 25001 AND 10001
WHERE department_id = 50
AND
salary BETWEEN 10000 AND 25000
(*)
WHERE department_id > 50
AND
salary BETWEEN 10000 AND 25000
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