Section
3 Quiz
(Answer all questions in this
section)
1. The PLAYERS table contains these
columns:
PLAYERS
TABLE:
LAST_NAME
VARCHAR2 (20)
FIRST_NAME
VARCHAR2 (20)
SALARY
NUMBER(8,2)
TEAM_ID
NUMBER(4)
MANAGER_ID
NUMBER(9)
POSITION_ID
NUMBER(4)
You
must display the player name, team id, and salary for players whose salary is
in the range from 25000 through 100000 and whose team id is in the range of
1200 through 1500. The results must be sorted by team id from lowest to highest
and then further sorted by salary from highest to lowest. Which statement
should you use to display the desired result?
Mark for Review
(1)
Points
SELECT last_name, first_name,
team_id, salary
FROM
players
WHERE
salary BETWEEN 24999.99 AND 100000.01
AND
team_id BETWEEN 1200 AND 1500
ORDER
BY team_id DESC, salary DESC;
SELECT last_name, first_name,
team_id, salary
FROM
players
WHERE
salary BETWEEN 25000 AND 100000
AND
team_id BETWEEN 1200 AND 1500
ORDER
BY team_id, salary DESC;
(*)
SELECT last_name, first_name,
team_id, salary
FROM
players
WHERE
(salary > 25000 OR salary < 100000)
AND
team_id BETWEEN 1200 AND 1500
ORDER
BY team_id, salary;
SELECT last_name, first_name,
team_id, salary
FROM
players
WHERE
salary > 24999.99 AND salary < 100000
AND
team_id BETWEEN 1200 AND 1500
ORDER
BY team_id ASC, salary DESC;
2. Evaluate this SQL statement:
SELECT
e.employee_id, e.last_name, e.first_name, m.manager_id
FROM
employees e, employees m
ORDER
BY e.last_name, e.first_name
WHERE
e.employee_id = m.manager_id;
This
statement fails when executed. Which change will correct the problem?
Mark for Review
(1)
Points
Remove the table aliases in the
WHERE clause.
Reorder the clauses in the query.
(*)
Include a HAVING clause.
Remove the table aliases in the
ORDER BY clause.
3. Will the following statement return one
row?
SELECT
MAX(salary), MIN(Salary), AVG(SALARY)
FROM
employees;
Mark for Review
(1)
Points
No, it is illegal. You cannot use
more than one multi-row function in a SELECT statement.
Yes, it will return the highest
salary, the lowest salary, and the average salary from all employees. (*)
Yes, it will return the highest
salary from each employee.
Yes, it will return the average
salary from the employees table.
4. The function COUNT is a single row
function. True or False? Mark
for Review
(1)
Points
True
False (*)
5. The EMPLOYEES table contains these
columns:
EMPLOYEE_ID
NUMBER(9) PK
LAST_NAME
VARCHAR2(25)
FIRST_NAME
VARCHAR2(25)
DEPARTMENT_ID
NUMBER(9)
Compare
these two SQL statements:
1.
SELECT
DISTINCT department_id DEPT, last_name, first_name
FROM
employees
ORDER
BY department_id;
2.
SELECT
department_id DEPT, last_name, first_name
FROM
employees
ORDER
BY DEPT;
How
will the results differ?
Mark for Review
(1)
Points
One of the statements will return a
syntax error.
One of the statements will eliminate
all duplicate DEPARTMENT_ID values.
There is no difference in the result
between the two statements.
The statements will sort on different
column values. (*)
6. Which columns can be added to the ORDER
BY clause in the following SELECT statement? (Choose Three)
SELECT
first_name, last_name, salary, hire_date
FROM
employees
WHERE
department_id = 50
ORDER
BY ?????;
Mark for Review
(1)
Points
(Choose all
correct answers)
last_name, first_name (*)
Any column in the EMPLOYEES table,
any expression in the SELECT list or any ALIAS in the SELECT list (*)
All the columns in the database
All columns in the EMPLOYEES table (*)
The table name, EMPLOYEES, which
would then automatically sort by all columns in the table
7. Which SELECT statement should you use to
limit the display of product information to those products with a price of less
than 50? Mark for Review
(1) Points
SELECT product_id, product_name
FROM
products
GROUP
BY price < 50;
SELECT product_id, product_name
FROM
products
HAVING
price < 50;
SELECT product_id, product_name
FROM
products
WHERE
price < 50;
(*)
SELECT product_id, product_name
FROM
products
WHERE
price < 50.00
GROUP
BY price;
SELECT product_id, product_name
FROM
products
WHERE
price <= 50;
8. Evaluate this SQL statement:
SELECT
product_id, product_name, price
FROM
products
ORDER
BY product_name, price;
What
occurs when the statement is executed?
Mark for Review
(1)
Points
The results are sorted
alphabetically and then numerically. (*)
The results are sorted numerically
only.
The results are sorted numerically
and then alphabetically.
The results are sorted alphabetically
only.
9. Evaluate this SELECT statement:
SELECT
last_name, first_name, salary
FROM
employees;
How
will the results of this query be sorted?
Mark for Review
(1)
Points
The results will be sorted ascending
by LAST_NAME and FIRST_NAME only.
The database will display the rows
in whatever order it finds it in the database, so no particular order. (*)
The results will be sorted ascending
by the LAST_NAME column only.
The results will be sorted ascending
by LAST_NAME, FIRST_NAME, and SALARY.
10. Evaluate this SELECT statement:
SELECT
*
FROM
employees
WHERE
department_id = 34
OR
department_id = 45
OR
department_id = 67;
Which
operator is the equivalent of the OR conditions used in this SELECT statement?
Mark for Review
(1) Points
IN (*)
AND
BETWEEN AND ...
LIKE
11. From left to right, what is the correct
order of Precedence? Mark for Review
(1)
Points
Arithmetic, Concatenation,
Comparison, OR (*)
Arithmetic, NOT, Logical, Comparison
NOT, AND, OR, Arithmetic
Arithmetic, NOT, Concatenation,
Logical
12. What will be the results of the following
selection?
SELECT
*
FROM
employees
WHERE
last_name NOT LIKE 'A%' AND last_name NOT LIKE 'B%'
Mark for Review
(1)
Points
No rows will be returned. There is a
syntax error
All last names that do not begin
with A or B (*)
All rows will be returned
All last names that begin with A or
B
13. The ORDER BY clause always comes last.
True or False? Mark for Review
(1)
Points
True (*)
False
14. Which symbol in the WHERE clause means
"Not Equal To"? (Choose Two)
Mark for Review
(1)
Points
(Choose all
correct answers)
=+
<> (*)
><
NOT IN (..) (*)
15. Which comparison condition means
"Less Than or Equal To"?
Mark for Review
(1)
Points
">="
"+<"
"<=" (*)
"=)"
1. You attempt to query the database with
this SQL statement:
SELECT
product_id "Product Number", category_id "Category", price
"Price"
FROM
products
WHERE
"Category" = 5570
ORDER
BY "Product Number";
This
statement fails when executed. Which clause contains a syntax error?
Mark for Review
(1)
Points
WHERE "Category" = 5570
(*)
SELECT product_id "Product
Number", category_id "Category", price "price"
FROM products
ORDER BY "Product Number";
2. Which of the following is true of the
ORDER BY clause:? (Choose Two) Mark
for Review
(1)
Points
(Choose all
correct answers)
Displays the fetched rows in no
particular order
Must be the last clause of the SQL
statement (*)
Defaults to a descending order
(DESC)
Defaults to an ascending order (ASC)
(*)
3. Evaluate this SELECT statement:
SELECT
first_name, last_name, email
FROM
employees
ORDER
BY last_name;
Which
statement is true?
Mark for Review
(1)
Points
The rows will be sorted
alphabetically by the FIRST_NAME and then the LAST_NAME values
The rows will be sorted in reverse
alphabetical order by the LAST_NAME values.
The rows will not be sorted.
The rows will be sorted
alphabetically by the LAST_NAME values. (*)
4. Evaluate this SELECT statement:
SELECT
last_name, first_name, email
FROM
employees
ORDER
BY email;
If
the EMAIL column contains null values, which statement is true?
Mark for Review
(1)
Points
Null email values will be displayed
first in the result.
Null email values will be displayed
last in the result. (*)
Null email values will not be
displayed in the result.
The result will not be sorted.
5. Which columns can be added to the ORDER
BY clause in the following SELECT statement? (Choose Three)
SELECT
first_name, last_name, salary, hire_date
FROM
employees
WHERE
department_id = 50
ORDER
BY ?????;
Mark for Review
(1)
Points
(Choose all
correct answers)
All columns in the EMPLOYEES table
(*)
The table name, EMPLOYEES, which
would then automatically sort by all columns in the table
Any column in the EMPLOYEES table,
any expression in the SELECT list or any ALIAS in the SELECT list (*)
last_name, first_name (*)
All the columns in the database
6. The following statement represents a
multi-row function. True or False?
SELECT
MAX(salary)
FROM
employees
Mark for Review
(1)
Points
True (*)
False
7. Evaluate this SQL statement:
SELECT
e.employee_id, e.last_name, e.first_name, m.manager_id
FROM
employees e, employees m
ORDER
BY e.last_name, e.first_name
WHERE
e.employee_id = m.manager_id;
This
statement fails when executed. Which change will correct the problem?
Mark for Review
(1)
Points
Include a HAVING clause.
Remove the table aliases in the
WHERE clause.
Reorder the clauses in the query.
(*)
Remove the table aliases in the
ORDER BY clause.
8. The conversion function TO_CHAR is a
single row function. True or False? Mark
for Review
(1)
Points
True (*)
False
9. The following statement represents a
multi-row function. True or False?
SELECT
UPPER(last_name)
FROM
employees;
Mark for Review
(1)
Points
True
False (*)
10. The function COUNT is a single row
function. True or False? Mark
for Review
(1)
Points
True
False (*)
11. Which of the following statements best
describes the rules of precedence when using SQL? Mark for Review
(1)
Points
The order in which the columns are
displayed
The order in which the expressions
are sorted
The order in which the operators are
returned
The order in which the expressions
are evaluated and calculated (*)
All of the above
12. Which of the following best describes the
meaning of the LIKE operator? Mark
for Review
(1)
Points
Match a character pattern. (*)
To test for values in a list.
Display rows based on a range of
values.
To find Null values.
13. Which statement about the ORDER BY clause
is true? Mark for Review
(1)
Points
You can use a column alias in the
ORDER BY clause. (*)
The default sort order of the ORDER
BY clause is descending.
The ORDER BY clause can only contain
columns that are included in the SELECT list.
The ORDER BY clause should
immediately precede the FROM clause in a SELECT statement
14. From left to right, what is the correct
order of Precedence? Mark for Review
(1)
Points
Arithmetic, NOT, Concatenation,
Logical
Arithmetic, NOT, Logical, Comparison
Arithmetic, Concatenation,
Comparison, OR (*)
NOT, AND, OR, Arithmetic
15. Find the clause that will give the same
results as:
SELECT
*
FROM
d_cds
WHERE
cd_id NOT IN(90, 91, 92);
Mark for Review
(1) Points
WHERE cd_id <=90 and cd_id
>=92;
WHERE cd_id NOT LIKE (90, 91, 92);
WHERE cd_id != 90 or cd_id != 91 or
cd_id!= 92;
WHERE cd_id != 90 and cd_id != 91
and cd_id != 92; (*)
1. The function COUNT is a single row
function. True or False? Mark
for Review
(1)
Points
True
False (*)
2. The PLAYERS table contains these
columns:
PLAYERS
TABLE:
LAST_NAME
VARCHAR2 (20)
FIRST_NAME
VARCHAR2 (20)
SALARY
NUMBER(8,2)
TEAM_ID
NUMBER(4)
MANAGER_ID
NUMBER(9)
POSITION_ID
NUMBER(4)
You
want to display all players' names with position 6900 or greater.
You
want the players names to be displayed alphabetically by last name and then by
first name.
Which
statement should you use to achieve the required results?
Mark for Review
(1)
Points
SELECT last_name, first_name
FROM
players
WHERE
position_id > 6900
ORDER
BY last_name, first_name;
SELECT last_name, first_name
FROM
players
WHERE
position_id >= 6900
ORDER
BY last_name DESC, first_name;
SELECT last_name, first_name
FROM
players
WHERE
position_id >= 6900
ORDER
BY last_name, first_name;
(*)
SELECT last_name, first_name
FROM
players
WHERE
position_id <= 6900
ORDER
BY last_name, first_name;
3. The EMPLOYEES table contains these
columns:
EMPLOYEE_ID
NUMBER(9) PK
LAST_NAME
VARCHAR2(25)
FIRST_NAME
VARCHAR2(25)
DEPARTMENT_ID
NUMBER(9)
Compare
these two SQL statements:
1.
SELECT
DISTINCT department_id DEPT, last_name, first_name
FROM
employees
ORDER
BY department_id;
2.
SELECT
department_id DEPT, last_name, first_name
FROM
employees
ORDER
BY DEPT;
How
will the results differ?
Mark for Review
(1)
Points
One of the statements will return a
syntax error.
There is no difference in the result
between the two statements.
One of the statements will eliminate
all duplicate DEPARTMENT_ID values.
The statements will sort on
different column values. (*)
4. The following statement represents a
multi-row function. True or False?
SELECT
MAX(salary)
FROM
employees
Mark for Review
(1)
Points
True (*)
False
5. The PLAYERS table contains these
columns:
PLAYERS
TABLE:
LAST_NAME
VARCHAR2 (20)
FIRST_NAME
VARCHAR2 (20)
SALARY
NUMBER(8,2)
TEAM_ID
NUMBER(4)
MANAGER_ID
NUMBER(9)
POSITION_ID
NUMBER(4)
You
must display the player name, team id, and salary for players whose salary is
in the range from 25000 through 100000 and whose team id is in the range of
1200 through 1500. The results must be sorted by team id from lowest to highest
and then further sorted by salary from highest to lowest. Which statement
should you use to display the desired result?
Mark for Review
(1)
Points
SELECT last_name, first_name,
team_id, salary
FROM
players
WHERE
salary BETWEEN 25000 AND 100000
AND
team_id BETWEEN 1200 AND 1500
ORDER
BY team_id, salary DESC;
(*)
SELECT last_name, first_name,
team_id, salary
FROM
players
WHERE
(salary > 25000 OR salary < 100000)
AND
team_id BETWEEN 1200 AND 1500
ORDER
BY team_id, salary;
SELECT last_name, first_name,
team_id, salary
FROM
players
WHERE
salary > 24999.99 AND salary < 100000
AND
team_id BETWEEN 1200 AND 1500
ORDER
BY team_id ASC, salary DESC;
SELECT last_name, first_name,
team_id, salary
FROM
players
WHERE
salary BETWEEN 24999.99 AND 100000.01
AND
team_id BETWEEN 1200 AND 1500
ORDER
BY team_id DESC, salary DESC;
6. Which statement about the ORDER BY
clause is true? Mark for
Review
(1)
Points
The ORDER BY clause can only contain
columns that are included in the SELECT list.
You can use a column alias in the
ORDER BY clause. (*)
The default sort order of the ORDER
BY clause is descending.
The ORDER BY clause should
immediately precede the FROM clause in a SELECT statement
7. Which of the following best describes
the meaning of the LIKE operator?
Mark for Review
(1)
Points
To find Null values.
Match a character pattern. (*)
Display rows based on a range of
values.
To test for values in a list.
8. Which of the following are TRUE
regarding the logical AND operator?
Mark for Review
(1)
Points
TRUE AND FALSE return FALSE (*)
TRUE AND TRUE return FALSE
TRUE AND FALSE return TRUE
FALSE AND TRUE return NULL
9. Which statement about the default sort
order is true? Mark for Review
(1)
Points
Character values are displayed in
reverse alphabetical order.
The lowest numeric values are displayed
last.
The earliest date values are
displayed first. (*)
Null values are displayed first.
10. What will be the results of the following
selection?
SELECT
*
FROM
employees
WHERE
last_name NOT LIKE 'A%' AND last_name NOT LIKE 'B%'
Mark for Review
(1)
Points
All last names that begin with A or
B
All last names that do not begin
with A or B (*)
No rows will be returned. There is a
syntax error
All rows will be returned
11. Evaluate this SELECT statement:
SELECT
employee_id, last_name, first_name, salary 'Yearly Salary'
FROM
employees
WHERE
salary IS NOT NULL
ORDER
BY last_name, 3;
Which
clause contains an error?
Mark for Review
(1)
Points
FROM employees
SELECT employee_id, last_name,
first_name, salary 'Yearly Salary' (*)
WHERE salary IS NOT NULL
ORDER BY last_name, 3;
12. Which of the following is true of the
ORDER BY clause:? (Choose Two) Mark
for Review
(1)
Points
(Choose all
correct answers)
Defaults to an ascending order (ASC)
(*)
Must be the last clause of the SQL
statement (*)
Defaults to a descending order
(DESC)
Displays the fetched rows in no
particular order
13. A column alias can be specified in an
ORDER BY Clause. True or False? Mark
for Review
(1)
Points
True (*)
False
14. Evaluate this SELECT statement:
SELECT
last_name, first_name, email
FROM
employees
ORDER
BY email;
If
the EMAIL column contains null values, which statement is true?
Mark for Review
(1)
Points
Null email values will be displayed
last in the result. (*)
The result will not be sorted.
Null email values will not be
displayed in the result.
Null email values will be displayed
first in the result.
15. You attempt to query the database with
this SQL statement:
SELECT
product_id "Product Number", category_id "Category", price
"Price"
FROM
products
WHERE
"Category" = 5570
ORDER
BY "Product Number";
This
statement fails when executed. Which clause contains a syntax error?
Mark for Review
(1)
Points
WHERE "Category" = 5570
(*)
ORDER BY "Product Number";
FROM products
SELECT product_id "Product
Number", category_id "Category", price "price"
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Evaluate this SELECT statement:
ReplyDeleteSELECT last_name, first_name, salary
FROM employees;
How will the results of this query be sorted?
The database will display the rows in whatever order it finds it in the database, so no particular order.
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Which of the following would be returned by this SQL statement:
ReplyDeleteSELECT First_name, last_name, department_id
FROM employees
WHERE department_id IN(50,80)
AND first_name LIKE ' C% '
OR last_name LIKE ' %s% '
FIRST_NAME LAST_NAME DEPARTMENT_ID
Shelly Higgins 110
FIRST_NAME LAST_NAME DEPARTMENT_ID
Curtis Davies 50
FIRST_NAME LAST_NAME DEPARTMENT_ID
Randall Matos 50
FIRST_NAME LAST_NAME DEPARTMENT_ID
Michael Hartstein 20
All of the above (*)
You query the database with this SQL statement:
ReplyDeleteSELECT price
FROM products
WHERE price IN(1, 25, 50, 250)
AND (price BETWEEN 25 AND 40 OR price > 50);
Which two values could the statement return? (Choose two.)
10
25 (*)
50
250 (*)
1
Which logical operator returns TRUE if either condition is true?
NOT
OR (*)
AND
BOTH
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ReplyDeleteWhich statement about the logical operators is true?
ReplyDeleteThe order of operator precedence is AND, NOT, and OR.
The order of operator precedence is NOT, AND, and OR. (*)
The order of operator precedence is NOT, OR, and AND.
The order of operator precedence is AND, OR, and NOT.
Will the following statement return one row?
ReplyDeleteSELECT MAX(salary), MIN(Salary), AVG(SALARY)
FROM employees;
Yes, it will return the highest salary, the lowest salary, and the average salary from all employees. (*)
Yes, it will return the average salary from the employees table.
Yes, it will return the highest salary from each employee.
No, it is illegal. You cannot use more than one multi-row function in a SELECT statement.
Evaluate this SELECT statement:
ReplyDeleteSELECT *
FROM employees
WHERE department_id = 34
OR department_id = 45
OR department_id = 67;
Which operator is the equivalent of the OR conditions used in this SELECT statement?
BETWEEN AND ...
LIKE
AND
IN (*)
Which clause would you include in a SELECT statement to sort the rows returned by the LAST_NAME column?
ReplyDeleteWHERE
HAVING
FROM
ORDER BY (*)
Which of the following is true of the ORDER BY clause? (Choose Two)
ReplyDelete(Choose all correct answers)
Displays the fetched rows in no particular order
Must be the last clause of the SQL statement (*)
Defaults to a descending order (DESC)
Defaults to an ascending order (ASC) (*)
Evaluate this SELECT statement:
ReplyDeleteSELECT last_name, first_name, department_id, manager_id
FROM employees;
You need to sort data by manager id values and then alphabetically by employee last name and first name values. Which ORDER BY clause could you use?
ORDER BY last_name, first_name, manager_id
ORDER BY manager_id, first_name, last_name
ORDER BY manager_id, last_name, first_name (*)
ORDER BY department_id, last_name
Evaluate this SELECT statement:
ReplyDeleteSELECT *
FROM employees
WHERE salary > 30000
AND department_id = 10
OR email IS NOT NULL;
Which statement is true?
The OR condition will be evaluated before the AND condition.
The OR and AND conditions have the same precedence and will be evaluated from left to right
The AND condition will be evaluated before the OR condition. (*)
The OR and AND conditions have the same precedence and will be evaluated from right to left
You need to create a report to display all employees that were hired on or before January 1, 1996. The data should display in this format:
ReplyDeleteEmployee Start Date and Salary
14837 - Smith 10-May-1992 / 5000
Which SELECT statement could you use?
SELECT employee_id || - || last_name "Employee",
hire_date || / || salary "Start Date and Salary
FROM employees
WHERE hire_date <= '01-Jan-1996';
SELECT employee_id ||'"- "|| last_name "Employee",
hire_date ||" / "|| salary Start Date and Salary"
FROM employees
WHERE hire_date <= '01-Jan-1996';
SELECT employee_id ||' - '|| last_name 'Employee',
hire_date ||' / '|| salary 'Start Date and Salary"
FROM employees
WHERE hire_date <= '01-Jan-1996';
SELECT employee_id ||' - '|| last_name "Employee",
hire_date ||' / '|| salary "Start Date and Salary"
FROM employees
WHERE hire_date <= '01-Jan-1996'; (*)
SELECT employee_id ||' '|| last_name "Employee",
hire_date ||' '|| salary "Start Date and Salary"
FROM employees
WHERE hire_date <= 01-Jan-1996';
Which of the following are examples of logical operators that might be used in a WHERE clause. (Choose Two)
ReplyDelete(Choose all correct answers)
AND, OR (*)
< >, =, <=, >=, <>
NOT (*)
LIKES
All of the above
You need to change the default sort order of the ORDER BY clause so that the data is displayed in reverse alphabetical order. Which keyword should you include in the ORDER BY clause?
ReplyDeleteSORT
DESC (*)
ASC
CHANGE
Which of the following is earliest in the rules of precedence?
ReplyDeleteArithmetic operator (*)
Logical condition
Comparison condition
Concatenation operator