Consider the conceptual schema given below.Your task is to perform the steps of logical database design, i.e. to transform a conceptual schema given above into a collection of relational...

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Consider the conceptual schema given below.










Your task is to perform the steps of logical database design, i.e. to transform a conceptual schema given above into a collection of relational schemas.










Before transforming




add the attribute ‘


phone


’ to the




BRANCH and




the attribute ‘


mobile-phone


’




to the CUSTOMER class.










Draw the resulting conceptual schema adding




your name


,




student number




and




the date




to the drawing. Use UMLet and paste images of your drawings into your Microsoft Word document using the template provided.










List the names of attributes, primary key, candidate keys (if any), and foreign keys (if any) for each class in the relational schema. Assume that an




association method




is used to implement the generalisation.










Show your working and explain as you step through the transformation process


.
Convert your Microsoft Word document based on the template provided into a pdf and submit your answer










as a file




question1.pdf

















DPIT115 Data Management and Security Final Assessment (Summer 2022)






















QUESTION 2 (10 marks)










Write the data definition statements of SQL that modify the structures of a database listed on page 2 of this assessment in the way described below.










Note, that some of the modifications may require more than one SQL data definition statement.
















  1. (1) Modify the consistency constraint of the sample database such that after the modification, it is possible to record in the database information about the trucks that have a capacity up to and including




    225


    .










    (2 marks)
















  2. (2) Modify the structure and consistency constraints of the sample database such that after the modification, it is possible to store information in the database about the total number of legs a trip contains. Assume that a trip cannot contain more than




    10




    legs.










    (2 marks)
















  3. (3) Modify the structure of the sample database so it is possible to store information in a new table in the database about mechanics employed by a transportation company. Assume that a description of a mechanic consists of an




    employee number


    ,




    first name


    ,




    last name


    ,




    date of birth




    and




    qualification level


    . A qualification level is a positive integer number




    1




    or




    2




    or




    3




    or




    4




    or




    5 or 6


    . Remember that a mechanic is an employee.










    (2 marks)
















  4. (4) Modify the consistency constraints of the sample database, so it is possible to store information about the




    trip




    without providing information about a




    driver licence number


    . Such modification is required when a driver leaves a transportation company, and we would like to keep information about all




    trips




    performed by the driver.










    (2 marks)
















  5. (5) Explain how the use of




    consistency constraints




    supports the management of data security. Use original examples that you make up yourself to illustrate your answer.










    (2 marks)
















Add your code into the




question2.sql




template provided and output your report file on your virtual machine










to a file named




question2.rpt


.
Add




your name


,




student number




and




the date




to the comments section of your SQL script.










Submit your answers as the files




question2.sql


,


question2.rpt




and




question2.pdf




using the templates provided.










Note your script may be tested and should not have any errors when run.










If a submitted file has an incorrect filename or file type, it may lose marks.






















Page




4




of




6


































DPIT115 Data Management and Security Final Assessment (Summer 2022)






















QUESTION 3 (10 marks)










Write the data manipulation statements of SQL that modify the contents of a database listed on page 2 of this lab task in the ways described below.










Note that you are not allowed to modify and/or to drop any consistency constraints. Also note, that to implement some of the modifications listed below, you may need more than one data manipulation statement.
















  1. (1) A new trip has been completed today. The trip was from




    Wollongong




    to




    Orange


    . The trip has been performed by the driver with the licence number




    412443




    (column




    LICENSENUM




    in a relational table




    TRIP


    ) who used the truck with registration number




    AD29FZ


    . Insert the appropriate information into the sample database assuming the next trip number is




    3452


    .










    (2 marks)
















  2. (2) Delete the information from the database about trip number




    53


    . Remember, that the foreign keys in










    all




    CREATE TABLE




    statements have no




    ON DELETE CASCADE




    clause.










    (2 marks)
















  3. (3) Change the status of all the drivers who have performed more than




    24




    trips to be




    ON LEAVE


    .










    (2 marks)
















  4. (4) Copy information about all employees born before the year




    2000




    to a new table




    S20CENT


    . There is no need to enforce any consistency constraints on the new table.










    (2 marks)
















  5. (5) Explain how the




    Data Definition Languate




    (


    DDL


    ) statements of SQL are used in data management and security. Use original examples including sample code that you make up yourself to illustrate your answer.










    (2 marks)
















Submit your answer as files named




question3.sql




and




question3.pdf




using the templates provided. Add




your name


,




student number




and




the date




to the comments section of your SQL script.






If a submitted file has an incorrect filename or file type, it may lose marks.























DPIT115 Data Management and Security Final Assessment (Summer 2022)






















QUESTION 4 (10 marks)










Assume that the user




root




with a password '


DPIT115


' created a database called




transport




and the user




‘root’




executed CREATE TABLE statements given on page 2 of the examination paper to create the relational tables in the database transport.










Write a SQL script that performs the following operations the user




‘


root


’


. Assume that the user




‘


root


’




has already connected to the database.
















  1. (1) The user




    ‘


    roo


    t


    ’




    nominates a database




    transport




    as a default database, and then the user creates two roles




    ‘


    driver


    ’




    and




    ‘


    admin


    ’


    .










    (1 mark)
















  2. (2) The user




    ‘


    root


    ’




    grants read access rights to the relational tables EMPLOYEE and DRIVER to the role




    ‘


    admin


    ’


    . The read access rights cannot be propagated to other roles or users.










    (1 mark)
















  3. (3) The user




    ‘


    root


    ’




    grants the rights to insert the rows into a relational tables TRIP and TRIPLEG to










    the role




    ‘


    driver


    ’


    . The access rights can be propagated to other roles or users.
















  4. (4) The user




    ‘


    root


    ’




    grants the update privilege on all relational tables in the




    transport




    database to the




























role




‘


admin


’


. The privilege cannot be propagated to other roles or users.
















  1. (5) The user




    ‘


    root


    ’




    grants the read access rights to information about the total number of trips










    performed by each driver to a role




    ‘


    driver


    ’


    .










    (1 mark)
















  2. (6) The user




    ‘


    root


    ’




    creates




    five (5)




    new users and grants the role




    ‘


    driver


    ’




    to




    two (2)




    of the users, and the role




    ‘


    admin


    ’




    to the




    all




    other users. The names and passwords of the new user accounts are up to you. (1 mark)
















  3. (7) The user




    ‘


    root


    ’




    sets the resource limits for the users created in the previous step allowing




    ten (10)




    maximum concurrent connections. Finally, the user




    ‘


    root


    ’




    locks all the user accounts created in the previous step. (1 mark)
















  4. (8) Explain in your own words the difference between




    Authentication




    and




    Authorisation


    . Use original examples that you make up yourself and diagrams that you draw yourself to illustrate your
















answer. (3 marks)










Add your code into the




question4.sql




template provided and output your report file on your virtual machine to a file named




question4.rpt










Add




your name


,




student number




and




the date




to the comments section of your SQL script.
Submit your answers as files named




question4.sql


,




question4.rpt




and




question4.pdf,




use the templates










provided.
Note your script may be tested and should not have any errors when run.






If a submitted file has an incorrect filename or file type, it may lose marks.










END OF ASSESSMENT















































2022-summer-dpit115-final-assignment-dp31ctjn.pdf question2-tmomft5g.sql question3-fg0tskwv.sql question4-ezxrenj1.sql question1-3ik4bn2a.docx
Answered Same DayJan 17, 2023

Answer To: Consider the conceptual schema given below.Your task is to perform the steps of...

Aditi answered on Jan 17 2023
46 Votes
Question 2
1. Modify the consistency constraint of the sample database such that after the modification, it is possible to record in the database information about the trucks that have a capacity up to and including 225.
SQL:
CREATE TABLE TRUCK(
REGNUM VARCHAR(10) NOT NULL, /* Registration number */ CAPACITY DECIMAL(7) NOT NULL, /* Capacity */
WEIGHT DECIMAL(7) NOT NULL, /* Weight */
STATUS VARCHAR(10) NOT NULL, /* Present status */ CONSTRAINT TRUCK_PKEY PRIMARY KEY(REGNUM),
CONSTRAINT TRUCK_STATUS CHECK ( STATUS IN ('AVAILABLE', 'USED', 'MAINTAINED')), CONSTRAINT TRUCK_WEIGHT CHECK ( WEIGHT > 0.0 AND WEIGHT < 225), CONSTRAINT TRUCK_CAPACITY CHECK ( CAPACITY > 0.0 AND CAPACITY <= 225 )
);
2. Modify the structure and consistency constraints of the sample database such that after the modification, it is possible to store information in the database about the total number of legs a trip contains. Assume that a trip cannot contain more than 10 legs.
SQL:
CREATE TABLE TRIP(
TRIPNUM DECIMAL(10) NOT NULL, /* Trip number */ LICENSENUM DECIMAL(8) NOT NULL, /* Driving license number */ REGNUM VARCHAR(10) NOT NULL, /* Truck registration number */ TDATE DATE NOT NULL, /* Trip date */
LEGSNUM DECIMAL(7) NOT NULL, /* Number of legs */ CONSTRAINT TRIP_PKEY PRIMARY KEY...
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