Primary Key: A Primary Key in a database table is a field in the table that uniquely identifies every row or record present in the database table. Example: Students in Universities are assigned a unique registration number. Therefore, in a STUDENT database table, the attribute “reg_no” acts as primary key. Foreign Key: Foreign Key is a column in a relational database table which provides a relation between two tables. It provides a cross reference between tables by pointing to primary key of another table. Example: In STUDENT database table, the attribute “reg_no” acts as primary key and in COURSE database table in which the student selects his or her course, the same “reg_no” acts as foreign key for the STUDENT table. Given database tables: Table Name: EMPLOYEE EMP_CODE EMP_TITLE EMP_LNAME EMP_FNAME EMP_INITIAL EMP_DOB STORE_CODE 1 Mr. Williamson John W 21-May-84 3 2 Ms. Ratula Nancy 09-Feb-89 2 3 Ms. Greenboro Lottie R 02-Oct-81 4 4 Mrs. Rumpersfro Jennie S 01-Jun-71 5 5 Mr. Smith Robert L 23-Nov-59 3 6 Mr. Renselear Cary A 25-Dec-85 1 7 Mr. Ogallo Roberto S 31-Jul-82 3 8 Ms. Johnson Elizabeth I 10-Sep-88 1 9 Mr. Eindsmar Jack W 19-Apr-55 2 10 Mrs. Jones Rose R 06-Mar-66 4 11 Mr. Broderick Tom 21-Oct-72 3 12 Mr. Washington Alan Y 08-Sept-74 2 13 Mr. Smith Peter N 25-Aug-64 3 14 Ms. Smith Sherry H 25-May-66 4 15 Mr. Olenko Howard U 24-May-64 5 16 Mr. Archialo Barry V 03-Sep-60 5 17 Ms. Grimaldo Jeanine K 12-Nov-70 4 18 Mr. Rosenburg Andrew D 24-Jan-71 4 19 Mr. Rosten Peter F 03-Oct-68 4 20 Mr. Mckee Robert S 06-Mar-70 1 21 Ms. Baumann Jennifer A 11-Dec-74 3 Table Name: STORE STORE_CODE STORE_NAME STORE_YTD_SALES REGION_CODE EMP_CODE 1 Access Junction 1003455.76 2 8 2 Database Corner 1421987.39 2 12 3 Tuple Charge 986783.22 1 7 4 Attribute Alley 944568.56 2 3 5 Primary Key Point 2930098.45 1 15 Table Name: REGION REGION_CODE REGION_DESCRIPT 1 EAST 2 WEST

Question

• Solve the problem (pls refer to the inserted image)

Answer 1

Question

Chapter 3, Problem 1P

Program Plan Intro

Primary Key:

A Primary Key in a database table is a field in the table that uniquely identifies every row or record present in the database table.

Example:

Students in Universities are assigned a unique registration number. Therefore, in a STUDENT database table, the attribute “reg_no” acts as primary key.

Foreign Key:

Foreign Key is a column in a relational database table which provides a relation between two tables. It provides a cross reference between tables by pointing to primary key of another table.

Example:

In STUDENT database table, the attribute “reg_no” acts as primary key and in COURSE database table in which the student selects his or her course, the same “reg_no” acts as foreign key for the STUDENT table.

Given database tables:

Table Name: EMPLOYEE

EMP_CODE EMP_TITLE EMP_LNAME EMP_FNAME EMP_INITIAL EMP_DOB STORE_CODE

1 Mr. Williamson John W 21-May-84 3

2 Ms. Ratula Nancy 09-Feb-89 2

3 Ms. Greenboro Lottie R 02-Oct-81 4

4 Mrs. Rumpersfro Jennie S 01-Jun-71 5

5 Mr. Smith Robert L 23-Nov-59 3

6 Mr. Renselear Cary A 25-Dec-85 1

7 Mr. Ogallo Roberto S 31-Jul-82 3

8 Ms. Johnson Elizabeth I 10-Sep-88 1

9 Mr. Eindsmar Jack W 19-Apr-55 2

10 Mrs. Jones Rose R 06-Mar-66 4

11 Mr. Broderick Tom 21-Oct-72 3

12 Mr. Washington Alan Y 08-Sept-74 2

13 Mr. Smith Peter N 25-Aug-64 3

14 Ms. Smith Sherry H 25-May-66 4

15 Mr. Olenko Howard U 24-May-64 5

16 Mr. Archialo Barry V 03-Sep-60 5

17 Ms. Grimaldo Jeanine K 12-Nov-70 4

18 Mr. Rosenburg Andrew D 24-Jan-71 4

19 Mr. Rosten Peter F 03-Oct-68 4

20 Mr. Mckee Robert S 06-Mar-70 1

21 Ms. Baumann Jennifer A 11-Dec-74 3

Table Name: STORE

STORE_CODE STORE_NAME STORE_YTD_SALES REGION_CODE EMP_CODE

1 Access Junction 1003455.76 2 8

2 Database Corner 1421987.39 2 12

3 Tuple Charge 986783.22 1 7

4 Attribute Alley 944568.56 2 3

5 Primary Key Point 2930098.45 1 15

Table Name: REGION

REGION_CODE REGION_DESCRIPT

1 EAST

2 WEST

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Write .php file that saves car booking and displays feedback. There are 2 buttons, which are <Book it> <Select a date>. <Select a date> button gets an input from the user, start date and an end date. Book it button can be pressed only if the start date and ending date are chosen by the user. If successful, it books cars for specific dates, with bookings saved. Booking should be in the .json file which contains all the bookings, and have the following information: Start Date. End Date. User Email. Car ID. If the car is already booked for the selected period, a failure message should be displayed, along with a button to return to the homepage. In the booking.json file, if the Car ID and start date and end date matches, it fails Use AJAX: Save bookings and display feedback without page refresh, using a custom modal (not alert).

Write .php file with the html that saves car booking and displays feedback. Booking should be in the .json file which contains all the bookings, and have the following information: Start Date. End Date. User Email. Car ID. There are 2 buttons, which are <Book it> <Select a date> Book it button can be pressed only if the start date and ending date are chosen by the user. If successful, book cars for specific dates, with bookings saved. If the car is already booked for the selected period, a failure message should be displayed, along with a button to return to the homepage. Use AJAX: Save bookings and display feedback without page refresh, using a custom modal (not alert). And then add an additional feature that only free dates are selectable (e.g., calendar view).

Answer 2

Question

Chapter 3, Problem 1P

Program Plan Intro

Primary Key:

A Primary Key in a database table is a field in the table that uniquely identifies every row or record present in the database table.

Example:

Students in Universities are assigned a unique registration number. Therefore, in a STUDENT database table, the attribute “reg_no” acts as primary key.

Foreign Key:

Foreign Key is a column in a relational database table which provides a relation between two tables. It provides a cross reference between tables by pointing to primary key of another table.

Example:

In STUDENT database table, the attribute “reg_no” acts as primary key and in COURSE database table in which the student selects his or her course, the same “reg_no” acts as foreign key for the STUDENT table.

Given database tables:

Table Name: EMPLOYEE

EMP_CODE EMP_TITLE EMP_LNAME EMP_FNAME EMP_INITIAL EMP_DOB STORE_CODE

1 Mr. Williamson John W 21-May-84 3

2 Ms. Ratula Nancy 09-Feb-89 2

3 Ms. Greenboro Lottie R 02-Oct-81 4

4 Mrs. Rumpersfro Jennie S 01-Jun-71 5

5 Mr. Smith Robert L 23-Nov-59 3

6 Mr. Renselear Cary A 25-Dec-85 1

7 Mr. Ogallo Roberto S 31-Jul-82 3

8 Ms. Johnson Elizabeth I 10-Sep-88 1

9 Mr. Eindsmar Jack W 19-Apr-55 2

10 Mrs. Jones Rose R 06-Mar-66 4

11 Mr. Broderick Tom 21-Oct-72 3

12 Mr. Washington Alan Y 08-Sept-74 2

13 Mr. Smith Peter N 25-Aug-64 3

14 Ms. Smith Sherry H 25-May-66 4

15 Mr. Olenko Howard U 24-May-64 5

16 Mr. Archialo Barry V 03-Sep-60 5

17 Ms. Grimaldo Jeanine K 12-Nov-70 4

18 Mr. Rosenburg Andrew D 24-Jan-71 4

19 Mr. Rosten Peter F 03-Oct-68 4

20 Mr. Mckee Robert S 06-Mar-70 1

21 Ms. Baumann Jennifer A 11-Dec-74 3

Table Name: STORE

STORE_CODE STORE_NAME STORE_YTD_SALES REGION_CODE EMP_CODE

1 Access Junction 1003455.76 2 8

2 Database Corner 1421987.39 2 12

3 Tuple Charge 986783.22 1 7

4 Attribute Alley 944568.56 2 3

5 Primary Key Point 2930098.45 1 15

Table Name: REGION

REGION_CODE REGION_DESCRIPT

1 EAST

2 WEST

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Answer 3

Question

Chapter 3, Problem 1P

Program Plan Intro

Primary Key:

A Primary Key in a database table is a field in the table that uniquely identifies every row or record present in the database table.

Example:

Students in Universities are assigned a unique registration number. Therefore, in a STUDENT database table, the attribute “reg_no” acts as primary key.

Foreign Key:

Foreign Key is a column in a relational database table which provides a relation between two tables. It provides a cross reference between tables by pointing to primary key of another table.

Example:

In STUDENT database table, the attribute “reg_no” acts as primary key and in COURSE database table in which the student selects his or her course, the same “reg_no” acts as foreign key for the STUDENT table.

Given database tables:

Table Name: EMPLOYEE

EMP_CODE EMP_TITLE EMP_LNAME EMP_FNAME EMP_INITIAL EMP_DOB STORE_CODE

1 Mr. Williamson John W 21-May-84 3

2 Ms. Ratula Nancy 09-Feb-89 2

3 Ms. Greenboro Lottie R 02-Oct-81 4

4 Mrs. Rumpersfro Jennie S 01-Jun-71 5

5 Mr. Smith Robert L 23-Nov-59 3

6 Mr. Renselear Cary A 25-Dec-85 1

7 Mr. Ogallo Roberto S 31-Jul-82 3

8 Ms. Johnson Elizabeth I 10-Sep-88 1

9 Mr. Eindsmar Jack W 19-Apr-55 2

10 Mrs. Jones Rose R 06-Mar-66 4

11 Mr. Broderick Tom 21-Oct-72 3

12 Mr. Washington Alan Y 08-Sept-74 2

13 Mr. Smith Peter N 25-Aug-64 3

14 Ms. Smith Sherry H 25-May-66 4

15 Mr. Olenko Howard U 24-May-64 5

16 Mr. Archialo Barry V 03-Sep-60 5

17 Ms. Grimaldo Jeanine K 12-Nov-70 4

18 Mr. Rosenburg Andrew D 24-Jan-71 4

19 Mr. Rosten Peter F 03-Oct-68 4

20 Mr. Mckee Robert S 06-Mar-70 1

21 Ms. Baumann Jennifer A 11-Dec-74 3

Table Name: STORE

STORE_CODE STORE_NAME STORE_YTD_SALES REGION_CODE EMP_CODE

1 Access Junction 1003455.76 2 8

2 Database Corner 1421987.39 2 12

3 Tuple Charge 986783.22 1 7

4 Attribute Alley 944568.56 2 3

5 Primary Key Point 2930098.45 1 15

Table Name: REGION

REGION_CODE REGION_DESCRIPT

1 EAST

2 WEST

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Answer 4

Question

Chapter 3, Problem 1P

Program Plan Intro

Primary Key:

A Primary Key in a database table is a field in the table that uniquely identifies every row or record present in the database table.

Example:

Students in Universities are assigned a unique registration number. Therefore, in a STUDENT database table, the attribute “reg_no” acts as primary key.

Foreign Key:

Foreign Key is a column in a relational database table which provides a relation between two tables. It provides a cross reference between tables by pointing to primary key of another table.

Example:

In STUDENT database table, the attribute “reg_no” acts as primary key and in COURSE database table in which the student selects his or her course, the same “reg_no” acts as foreign key for the STUDENT table.

Given database tables:

Table Name: EMPLOYEE

EMP_CODE EMP_TITLE EMP_LNAME EMP_FNAME EMP_INITIAL EMP_DOB STORE_CODE

1 Mr. Williamson John W 21-May-84 3

2 Ms. Ratula Nancy 09-Feb-89 2

3 Ms. Greenboro Lottie R 02-Oct-81 4

4 Mrs. Rumpersfro Jennie S 01-Jun-71 5

5 Mr. Smith Robert L 23-Nov-59 3

6 Mr. Renselear Cary A 25-Dec-85 1

7 Mr. Ogallo Roberto S 31-Jul-82 3

8 Ms. Johnson Elizabeth I 10-Sep-88 1

9 Mr. Eindsmar Jack W 19-Apr-55 2

10 Mrs. Jones Rose R 06-Mar-66 4

11 Mr. Broderick Tom 21-Oct-72 3

12 Mr. Washington Alan Y 08-Sept-74 2

13 Mr. Smith Peter N 25-Aug-64 3

14 Ms. Smith Sherry H 25-May-66 4

15 Mr. Olenko Howard U 24-May-64 5

16 Mr. Archialo Barry V 03-Sep-60 5

17 Ms. Grimaldo Jeanine K 12-Nov-70 4

18 Mr. Rosenburg Andrew D 24-Jan-71 4

19 Mr. Rosten Peter F 03-Oct-68 4

20 Mr. Mckee Robert S 06-Mar-70 1

21 Ms. Baumann Jennifer A 11-Dec-74 3

Table Name: STORE

STORE_CODE STORE_NAME STORE_YTD_SALES REGION_CODE EMP_CODE

1 Access Junction 1003455.76 2 8

2 Database Corner 1421987.39 2 12

3 Tuple Charge 986783.22 1 7

4 Attribute Alley 944568.56 2 3

5 Primary Key Point 2930098.45 1 15

Table Name: REGION

REGION_CODE REGION_DESCRIPT

1 EAST

2 WEST

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Answer 5

Chapter 3, Problem 1P

Program Plan Intro

Primary Key:

A Primary Key in a database table is a field in the table that uniquely identifies every row or record present in the database table.

Example:

Students in Universities are assigned a unique registration number. Therefore, in a STUDENT database table, the attribute “reg_no” acts as primary key.

Foreign Key:

Foreign Key is a column in a relational database table which provides a relation between two tables. It provides a cross reference between tables by pointing to primary key of another table.

Example:

In STUDENT database table, the attribute “reg_no” acts as primary key and in COURSE database table in which the student selects his or her course, the same “reg_no” acts as foreign key for the STUDENT table.

Given database tables:

Table Name: EMPLOYEE

EMP_CODE EMP_TITLE EMP_LNAME EMP_FNAME EMP_INITIAL EMP_DOB STORE_CODE

1 Mr. Williamson John W 21-May-84 3

2 Ms. Ratula Nancy 09-Feb-89 2

3 Ms. Greenboro Lottie R 02-Oct-81 4

4 Mrs. Rumpersfro Jennie S 01-Jun-71 5

5 Mr. Smith Robert L 23-Nov-59 3

6 Mr. Renselear Cary A 25-Dec-85 1

7 Mr. Ogallo Roberto S 31-Jul-82 3

8 Ms. Johnson Elizabeth I 10-Sep-88 1

9 Mr. Eindsmar Jack W 19-Apr-55 2

10 Mrs. Jones Rose R 06-Mar-66 4

11 Mr. Broderick Tom 21-Oct-72 3

12 Mr. Washington Alan Y 08-Sept-74 2

13 Mr. Smith Peter N 25-Aug-64 3

14 Ms. Smith Sherry H 25-May-66 4

15 Mr. Olenko Howard U 24-May-64 5

16 Mr. Archialo Barry V 03-Sep-60 5

17 Ms. Grimaldo Jeanine K 12-Nov-70 4

18 Mr. Rosenburg Andrew D 24-Jan-71 4

19 Mr. Rosten Peter F 03-Oct-68 4

20 Mr. Mckee Robert S 06-Mar-70 1

21 Ms. Baumann Jennifer A 11-Dec-74 3

Table Name: STORE

STORE_CODE STORE_NAME STORE_YTD_SALES REGION_CODE EMP_CODE

1 Access Junction 1003455.76 2 8

2 Database Corner 1421987.39 2 12

3 Tuple Charge 986783.22 1 7

4 Attribute Alley 944568.56 2 3

5 Primary Key Point 2930098.45 1 15

Table Name: REGION

REGION_CODE REGION_DESCRIPT

1 EAST

2 WEST

Answer 6

Chapter 3, Problem 1P

Program Plan Intro

Primary Key:

A Primary Key in a database table is a field in the table that uniquely identifies every row or record present in the database table.

Example:

Students in Universities are assigned a unique registration number. Therefore, in a STUDENT database table, the attribute “reg_no” acts as primary key.

Foreign Key:

Foreign Key is a column in a relational database table which provides a relation between two tables. It provides a cross reference between tables by pointing to primary key of another table.

Example:

In STUDENT database table, the attribute “reg_no” acts as primary key and in COURSE database table in which the student selects his or her course, the same “reg_no” acts as foreign key for the STUDENT table.

Given database tables:

Table Name: EMPLOYEE

EMP_CODE EMP_TITLE EMP_LNAME EMP_FNAME EMP_INITIAL EMP_DOB STORE_CODE

1 Mr. Williamson John W 21-May-84 3

2 Ms. Ratula Nancy 09-Feb-89 2

3 Ms. Greenboro Lottie R 02-Oct-81 4

4 Mrs. Rumpersfro Jennie S 01-Jun-71 5

5 Mr. Smith Robert L 23-Nov-59 3

6 Mr. Renselear Cary A 25-Dec-85 1

7 Mr. Ogallo Roberto S 31-Jul-82 3

8 Ms. Johnson Elizabeth I 10-Sep-88 1

9 Mr. Eindsmar Jack W 19-Apr-55 2

10 Mrs. Jones Rose R 06-Mar-66 4

11 Mr. Broderick Tom 21-Oct-72 3

12 Mr. Washington Alan Y 08-Sept-74 2

13 Mr. Smith Peter N 25-Aug-64 3

14 Ms. Smith Sherry H 25-May-66 4

15 Mr. Olenko Howard U 24-May-64 5

16 Mr. Archialo Barry V 03-Sep-60 5

17 Ms. Grimaldo Jeanine K 12-Nov-70 4

18 Mr. Rosenburg Andrew D 24-Jan-71 4

19 Mr. Rosten Peter F 03-Oct-68 4

20 Mr. Mckee Robert S 06-Mar-70 1

21 Ms. Baumann Jennifer A 11-Dec-74 3

Table Name: STORE

STORE_CODE STORE_NAME STORE_YTD_SALES REGION_CODE EMP_CODE

1 Access Junction 1003455.76 2 8

2 Database Corner 1421987.39 2 12

3 Tuple Charge 986783.22 1 7

4 Attribute Alley 944568.56 2 3

5 Primary Key Point 2930098.45 1 15

Table Name: REGION

REGION_CODE REGION_DESCRIPT

1 EAST

2 WEST

Answer 7

Chapter 3, Problem 1P

Program Plan Intro

Primary Key:

A Primary Key in a database table is a field in the table that uniquely identifies every row or record present in the database table.

Example:

Students in Universities are assigned a unique registration number. Therefore, in a STUDENT database table, the attribute “reg_no” acts as primary key.

Foreign Key:

Foreign Key is a column in a relational database table which provides a relation between two tables. It provides a cross reference between tables by pointing to primary key of another table.

Example:

In STUDENT database table, the attribute “reg_no” acts as primary key and in COURSE database table in which the student selects his or her course, the same “reg_no” acts as foreign key for the STUDENT table.

Given database tables:

Table Name: EMPLOYEE

EMP_CODE EMP_TITLE EMP_LNAME EMP_FNAME EMP_INITIAL EMP_DOB STORE_CODE

1 Mr. Williamson John W 21-May-84 3

2 Ms. Ratula Nancy 09-Feb-89 2

3 Ms. Greenboro Lottie R 02-Oct-81 4

4 Mrs. Rumpersfro Jennie S 01-Jun-71 5

5 Mr. Smith Robert L 23-Nov-59 3

6 Mr. Renselear Cary A 25-Dec-85 1

7 Mr. Ogallo Roberto S 31-Jul-82 3

8 Ms. Johnson Elizabeth I 10-Sep-88 1

9 Mr. Eindsmar Jack W 19-Apr-55 2

10 Mrs. Jones Rose R 06-Mar-66 4

11 Mr. Broderick Tom 21-Oct-72 3

12 Mr. Washington Alan Y 08-Sept-74 2

13 Mr. Smith Peter N 25-Aug-64 3

14 Ms. Smith Sherry H 25-May-66 4

15 Mr. Olenko Howard U 24-May-64 5

16 Mr. Archialo Barry V 03-Sep-60 5

17 Ms. Grimaldo Jeanine K 12-Nov-70 4

18 Mr. Rosenburg Andrew D 24-Jan-71 4

19 Mr. Rosten Peter F 03-Oct-68 4

20 Mr. Mckee Robert S 06-Mar-70 1

21 Ms. Baumann Jennifer A 11-Dec-74 3

Table Name: STORE

STORE_CODE STORE_NAME STORE_YTD_SALES REGION_CODE EMP_CODE

1 Access Junction 1003455.76 2 8

2 Database Corner 1421987.39 2 12

3 Tuple Charge 986783.22 1 7

4 Attribute Alley 944568.56 2 3

5 Primary Key Point 2930098.45 1 15

Table Name: REGION

REGION_CODE REGION_DESCRIPT

1 EAST

2 WEST

Answer 8

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Ch. 3 - What is the difference between a database and a...Ch. 3 - Prob. 2RQ Ch. 3 - Prob. 3RQ Ch. 3 - What are the requirements that two relations must...Ch. 3 - Which relational algebra operators can be applied...Ch. 3 - Explain why the data dictionary is sometimes...Ch. 3 - A database user manually notes that The file...Ch. 3 - Prob. 8RQ Ch. 3 - Prob. 9RQ Ch. 3 - Prob. 10RQ

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Chapter 3 Solutions

EMP_CODE	EMP_TITLE	EMP_LNAME	EMP_FNAME	EMP_INITIAL	EMP_DOB	STORE_CODE
1	Mr.	Williamson	John	W	21-May-84	3
2	Ms.	Ratula	Nancy		09-Feb-89	2
3	Ms.	Greenboro	Lottie	R	02-Oct-81	4
4	Mrs.	Rumpersfro	Jennie	S	01-Jun-71	5
5	Mr.	Smith	Robert	L	23-Nov-59	3
6	Mr.	Renselear	Cary	A	25-Dec-85	1
7	Mr.	Ogallo	Roberto	S	31-Jul-82	3
8	Ms.	Johnson	Elizabeth	I	10-Sep-88	1
9	Mr.	Eindsmar	Jack	W	19-Apr-55	2
10	Mrs.	Jones	Rose	R	06-Mar-66	4
11	Mr.	Broderick	Tom		21-Oct-72	3
12	Mr.	Washington	Alan	Y	08-Sept-74	2
13	Mr.	Smith	Peter	N	25-Aug-64	3
14	Ms.	Smith	Sherry	H	25-May-66	4
15	Mr.	Olenko	Howard	U	24-May-64	5
16	Mr.	Archialo	Barry	V	03-Sep-60	5
17	Ms.	Grimaldo	Jeanine	K	12-Nov-70	4
18	Mr.	Rosenburg	Andrew	D	24-Jan-71	4
19	Mr.	Rosten	Peter	F	03-Oct-68	4
20	Mr.	Mckee	Robert	S	06-Mar-70	1
21	Ms.	Baumann	Jennifer	A	11-Dec-74	3

STORE_CODE	STORE_NAME	STORE_YTD_SALES	REGION_CODE	EMP_CODE
1	Access Junction	1003455.76	2	8
2	Database Corner	1421987.39	2	12
3	Tuple Charge	986783.22	1	7
4	Attribute Alley	944568.56	2	3
5	Primary Key Point	2930098.45	1	15