CO532 Assessment 3

Posted 2021-11-06 helpyourjava

CO532 Assessment 3
Here is one solution to Assessment 2
Conceptual Data Model
Assumptions
A student may have attended no training session
A chef may not have supervised a training session
A student may have not yet cooked for an event
At least one friend needs to attend the cook-and-dine event
A kitchen can be used by 0 or more sessions.
A kitchen can be used by 0 or more events.
Relational Schema
Primary keys are underlined and foreign keys are in italic. No foreign keys are allowed to be null.
Student(studentId, name, streetAddress, city, postcode, phoneNum)
TrainingSession(date, time, buildingName, roomNum, studentId, empId)
CookAndDineEvent(date, time, grade, buildingName, roomNum, studentId)
Kitchen(buildingName, roomNum)
Chef(empId, name, phoneNum, email, qualification)
Friend(friendId, name, email, dietaryConstraints)
EventAttending(friendId, date, time, buildingName, roomNum)
Constraints
Unique Constraints:
TrainingSession
(date, time, studentId)
(date, time, empId)
CookAndDineEvent Unique Constraints
(studentId)
Domain Constraints:
grade: {‘A‘, ‘B‘, ‘C‘, ‘D‘, ‘E‘, ‘F‘}
qualification: {‘certificate‘, ‘associate degree‘, ‘bachelor‘, ‘master‘, ‘none‘}
Not Null Attributes:
Student: name
Friend: name
Chef: name, phoneNum, email, qualification
TASK 1 (40%)
From the above information, implement the database tables in PostgreSQL, choosing sensible data types for each
column. Ensure you maintain referential integrity. Implement all the above domain constraints and unique columns.
Add appropriate not null constraints to attributes. Ensure your data types and constraints allow for sensible future
data to be added to the database in the future.
Insert the following data into the tables. Do not add any data except this.
Student
studentId Name streetAddress city postcode phoneNum
1 Sue Faffer 12 Meryl Street Canterbury CT6 8UJ [phone]
2 Chris Driver 3a Carla Lane Herne Bay CT4 9KL NULL
3 Olive Kemp 1 Cecil Road Canterbury CT6 8UJ 01227871000 extension 105
4 Sue Faffer 14 Meryl Street Canterbury CT6 8UJ 1227943979
TrainingSession
Date Time buildingName roomNum studentId empId
10/01/2019 10:00:00 farm house 2 1 1001
11/01/2019 12:00:00 annex 1 1 1001
12/01/2019 10:00:00 annex 1 1 1002
13/01/2019 12:00:00 farm house 2 4 1003
05/02/2019 10:00:00 farm house 1 1 1003
05/02/2019 10:00:00 farm house 2 2 1002
05/02/2019 10:00:00 annex 2 3 1001
CookAndDineEvent
date Time Grade buildingName roomNum studentId
06/02/2019 18:00:00 A annex 1 4
05/02/2019 12:00:00 B farm house 2 1
03/05/2019 12:00:00 NULL annex 1 2
Kitchen
buildingName roomNum
annex 1
annex 2
farm house 1
farm house 2
farm house 3
Chef
empId name phoneNum email qualification
1001 Sally Smith [phone] [email protected] certificate
1002 Ben Driver 0779 601423 [email protected] none
1003 Jane Smith 01227 8812061 [email protected] certificate
Friend
friendid Name Email dietaryConstraints
2 Yasser Crimp [email protected] Allergic to Nuts
1 Jane Smith NULL NULL
3 Ben Blimp [email protected] None
5 Chris Driver [email protected] No
4 Jim Smith [email protected] Gluten free only.
EventAttending
friendId date Time buildingName roomNum
2 03/05/2019 12:00:00 annex 1
4 03/05/2019 12:00:00 annex 1
1 05/02/2019 12:00:00 farm house 2
2 06/02/2019 18:00:00 annex 1
3 06/02/2019 18:00:00 annex 1
TASK 2 (10% Each query)
Answer each of the below with a single PostgreSQL query. For queries that return information, return only the data
specified and use only the information provided in the question: the queries must utilize the information given, do not
hard code ids or other information that is not explicitly given. Ensure the queries will work with any future data, not
just the data given.
2.1) List the Chef name, phoneNum, date and time for all TrainingSessions. Sort alphabetically by Chef name first, then
earliest in terms of date and time first.
2.2) For each student with training sessions in the farm house, give the number of such training sessions, student
name and studentId.
2.3) Give the student name, dietaryConstraints, date and time for all cookAndDineEvents that Yasser Crimp will be
attending.
2.4) Give the Student name, TrainingSession date and times for all students who do not have a CookAndDineEvent.
2.5) List the date, time, student name and studentId for all activities (both Training Sessions and CookAndDineEvents).
2.6) For the TrainingSessions with all Chefs who are qualified with a certificate and which are in farm house roomNum
2, change the location to be in farm house roomNum 3.
Submitting
Submit via Moodle. The deadline is given there.
Submit one file in plain text format. It must have a .txt extension.
In the file you should provide:
The PostgreSQL commands that you used to create the tables (in the order you created them).
The PostgreSQL commands that you used to insert the data (in the order you inserted the data).
The PostgreSQL commands to run the queries.
Code that does not work will get 0 marks. Any non-executable text must be in comments, for example, either on lines
starting with “--” or between java-like /* … */ blocks. Put a comment indicating the question number before
each query from Task 2 (e.g. “-- 2.1”).
Late submissions will get 0 marks.
I will not be available on the day of submission for questions, make sure you get any queries to me before then.
Peter Rodgers

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