Design Final 2

1. The explanation below is a column integrity constraint: A column must contain only values

consistent with the defined data format of the column. True or False?

True

False

2. A table must have at least one candidate key, as well as its primary key. True or

False?

True

False

3. A table must have a primary key. True or False? Mark for Review (1) Points

True

False

4. A foreign key can not refer to a primary key in the same table. True or False?

Mark for Review (1) Points

True

False

Section 12 Lesson 2(Answer all questions in this section) 5. In a

physical data model, a relationship is represented as a combination of: (Choose Two) (Choose all correct answers)

Column

Primary Key or Unique Key

Check Constraint or Unique Key

Foreign Key

6. In an Oracle database, why would 1_TABLE not work as a table name?

The database does not understand all capital letters

There is no problem here. You can create a table called 1_TABLE

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Object names must not start with a number. They must begin with a letter

TABLE is a reserved word

7. Attributes become tables in a database. True or False?

True

False

Section 12 Lesson 3(Answer all questions in this section) 8. The Oracle Database can implement a many to many relationship. You simple create two foreign keys

between the two tables. True or False? Mark for Review (1) Points

True

False

9. What do you create when you transform a many to many relationship from your ER

diagram into a physical design?

Unique key constraints

Intersection entity

Intersection table

Two tables with a Foreign key constraints between them

Section 12 Lesson 4(Answer all questions in this section) 10. An "Arc Implementation" can be done just like any other Relationship - you simply add the required

Foreign Keys. True or False?

True

False

Section 12 Lesson 4(Answer all questions in this section) 11. When translating an arc relationship to a physical design, you must turn the arc relationships into foreign keys. Assuming you are implementing an Exclusive Design, you must also create two Unique Key Constraints to

ensure the Arc is implemented correctly. True or False?

True



False

Section 13 Lesson 1(Answer all questions in this section) 12. What

command can used to create a new row in a table in the database?

CREATE

NEW

ADD

INSERT

13. What command will return data from the database to you?

FETCH

GET

SELECT

RETURN

Section 16 Lesson 1(Answer all questions in this section) 14. Which SQL keyword specifies that an alias will be substituted for a column name in the output of a SQL

query?

AS

OR

AND

SUBSTITUTE

15. In the default order of precedence, which operator would be evaluated first?

Subtractions

Multiplications

Additions

Divisions



16. Which statement best describes how arithmetic expressions are handled?

Addition operations are handled before any other operations.

Multiplication and substraction operations are handled before any other operations.

Multiplication and addition operations are handled before subtraction and division operations.

Division and multiplication operations are handled before subtraction and addition operations.

17. You query the database with this SQL statement: SELECT * FROM students;

Why would you use this statement?

To insert data

To view data

To display the table structure

To delete data

18. The EMPLOYEES table contains these columns:

SALARY NUMBER(7,2) BONUS NUMBER(7,2) COMMISSION_PCT NUMBER(2,2)

All three columns contain values greater than zero. There is one row of data in the table and the values are as follows:

Salary = 500, Bonus = 50, Commission_pct = .5

Evaluate these two SQL statements:

1. SELECT salary + bonus + commission_pct * salary - bonus AS income FROM employees;

2. SELECT (salary + bonus ) + commission_pct * (salary - bonus) income FROM employees;



What will be the result?

Statement 1 will return a higher value than statement 2.

Statement 2 will return a higher value than statement 1.

Statement 1 will display a different column heading.

One of the statements will NOT execute.

19. Which keyword can be used to specify a column alias?

AS

DESCRIBE

FROM

WHERE

20. Evaluate this SELECT statement:

SELECT (salary * raise_percent) raise FROM employees;

If the RAISE_PERCENT column only contains null values, what will the statement return?

Only zeroes

Only null values

A null value or a zero depending on the value of the SALARY column

A null value or a numeric value depending on the value of the SALARY column

Section 16 Lesson 3(Answer all questions in this section) 21. There is only one kind of

software used by all computers. True or Fale?

True

False



22. All computers in the world speaks the same languages, so you only need to learn one

programming language - Oracle SQL. True or False?

True

False

Section 17 Lesson 1(Answer all questions in this section) 23. Which clause would you include in a SELECT statement to restrict the data returned to only the

employees in department 10?

WHERE

FROM

SELECT

IS

24. When using the LIKE condition, which symbol represents any sequence of none,

one or more characters?

_

%

#

&

25. Which comparison condition would you use to select rows that match a character

pattern?

IN

LIKE

ALMOST

SIMILAR

26. Which of the following elements cannot be included in a WHERE clause?

A column alias



A column name

A comparison condition

A constant

27. Which operator is used to combine columns of character strings to other columns?

*

/

+

||

28. You need to display all the rows in the EMPLOYEES table that contain a null value

in the DEPARTMENT_ID column. Which comparison operator should you use?

"= NULL"

NULL!

ISNULL

IS NULL

Section 17 Lesson 2(Answer all questions in this section) 29. You want to retrieve a list of customers whose last names begin with the letters Fr . Which symbol should

you include in the WHERE clause of your SELECT statement to achieve the desired result?

%

~

#

*

30. 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?

AND

IN



BETWEEN

LIKE

Section 17 Lesson 2(Answer all questions in this section) 31. What will the result of the following SELECT statement be:

SELECT last_name, salary, salary + 300 FROM employees;

Display the last name, salary and the results of adding 300 to each salary for all the employees

Modify the salary column by adding 300 and displaying the last name, salary and the new salary.

Modify the salary column by adding 300 and only display the last name and the new salary.

Display the last name, salary and the results of adding 300 to the salary of the first employee row

32. Which of the following commands will display the last name concatenated with the job ID from the employees table, separated by a comma and space, and label the resulting column "Employee and Title"?

SELECT " last name" ||', '|| "job_id" + "Employee and Title" FROM employees;

SELECT last_name||', '|| job_id "Employee and Title" FROM employees;

SELECT " last name" ||', '|| "job_id" + "Employee and Title" FROM emp;

SELECT last_name||","|| job_id "Employee and Title" FROM employees;

33. The PLAYERS table contains these columns:

PLAYER_ID NUMBER (9) Primary Key LAST_NAME VARCHAR2 (20) FIRST_NAME VARCHAR2 (20) TEAM_ID NUMBER (4) MANAGER_ID NUMBER (9) POSITION_ID NUMBER (4)

Which SELECT statement should you use if you want to display unique combinations of the TEAM_ID and MANAGER_ID columns?



SELECT * FROM players;

SELECT team_id, manager_id FROM players;

SELECT DISTINCT team_id, manager_id FROM players;

SELECT team_id, DISTINCT manager_id FROM players;

SELECT team_id, manager_id DISTINCT FROM players;

Section 17 Lesson 3(Answer all questions in this section) 34. The EMPLOYEES table contains these columns:

EMPLOYEE_ID NUMBER(9) PrimaryKey LAST_NAME VARCHAR2 (20) FIRST_NAME VARCHAR2 (20) DEPARTMENT_ID NUMBER(5) NOT NULL MANAGER_ID NUMBER(9) NOT NULL

Evaluate these two SELECT statements: 1. SELECT DISTINCT employee_id, department_id, manager_id FROM employees; 2. SELECT employee_id, department_id, manager_id FROM employees;

Which of the following statements is true?

The two statements will display the same data.

The first statement will display a particular DEPARTMENT_ID only once.

The first statement will NOT display values from all of the rows in the EMPLOYEE table

The second statement could display a unique combination of the EMPLOYEE_ID, MANAGER_ID, and DEPARTMENT_ID values more than once.

35. You want to create a report that displays all employees who were hired before January 1, 2000 and whose annual salaries are greater than 50000.

The EMPLOYEES table contains these columns:

EMPLOYEE_ID VARCHAR2(5) PRIMARY KEY LAST_NAME VARCHAR2(35) HIRE_DATE DATE DEPARTMENT_ID NUMBER(4)

The SALARY table contains these columns:



SALARY_ID VARCHAR2(5) PRIMARY KEY SALARY NUMBER(5, 2) EMPLOYEE_ID VARCHAR2(5) FOREIGN KEY

Which query should you issue?

SELECT last_name, hiredate, salary FROM employees NATURAL JOIN salary USING employee_id WHERE hiredate < 01-jan-00 AND salary > 50000;

SELECT last_name, hiredate, salary FROM employees JOIN salary ON employee_id = employee_id WHERE hiredate < '01-jan-00' AND salary > 50000;

SELECT last_name, hiredate, salary FROM employees NATURAL JOIN salary WHERE hiredate < '01-jan-00' AND salary > 50000;

SELECT last_name, hiredate, salary FROM employees (+) salary WHERE hiredate < '01-jan-00' AND salary > 50000;

36. 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?

True

False

Section 18 Lesson 1(Answer all questions in this section) 37. Which

statement about the ORDER BY clause is true?

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

38. Which logical operator returns TRUE if either condition is true?

OR

AND



NOT

BOTH

39. 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?

DESC

ASC

SORT

CHANGE

40. Which of the following are TRUE regarding the logical AND operator?

TRUE AND TRUE return FALSE

TRUE AND FALSE return TRUE

FALSE AND TRUE return NULL

TRUE AND FALSE return FALSE

Section 18 Lesson 1(Answer all questions in this section) 41. The ORDER BY clause

always comes last. True or False?

True

False

42. Which of the following best describes the meaning of the LIKE operator?

Display rows based on a range of values.

To test for values in a list.

Match a character pattern.

To find Null values.



Section 18 Lesson 2(Answer all questions in this section) 43. Evaluate this SELECT statement:

SELECT * 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 AND condition will be evaluated before the OR condition.

The OR and AND conditions have the same precedence and will be evaluated from left to right

The OR and AND conditions have the same precedence and will be evaluated from right to left


SELECT 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.

The results will be sorted ascending by the LAST_NAME column only.

The results will be sorted ascending by LAST_NAME and FIRST_NAME only.

The results will be sorted ascending by LAST_NAME, FIRST_NAME, and SALARY.


SELECT 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 department_id, last_name

ORDER BY manager_id, last_name, first_name

ORDER BY last_name, first_name, manager_id

ORDER BY manager_id, first_name, last_name


SELECT last_name, first_name, email FROM employees ORDER BY email;

If the EMAIL column contains null values, which statement is true?

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.


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?

SELECT employee_id, last_name, first_name, salary 'Yearly Salary'

FROM employees

WHERE salary IS NOT NULL

ORDER BY last_name, 3;




SELECT first_name, last_name, email FROM employees ORDER BY last_name;

Which statement is true?

The rows will not be sorted.

The rows will be sorted alphabetically by the LAST_NAME values.

The rows will be sorted in reverse alphabetical order by the LAST_NAME values.

The rows will be sorted alphabetically by the FIRST_NAME and then the LAST_NAME values

Section 18 Lesson 3(Answer all questions in this section) 49. 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?

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 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 > 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;

50. The EMPLOYEES table contains these columns:

EMPLOYEE_ID NUMBER(9) Primary Key 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?

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.



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Design Final 2

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