Draw an Entity Relationship Diagram (ERD) using Unified Modelling Language (UML) notation according to the below business rules. Your design should be at the
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- create an Enhanced Entity-Relationship (EER) diagram based on the provided information. Based on the following description, try creating the diagram using a tool such as draw.io, Lucidchart, or any other ER diagram tool: Entities: Person: person_ID (PK), name, address, birth date, phone number Subtypes: Employee, Physician, Patient, Volunteer Visit: date (PK, partial identifier), comments Care Centre: care_centre_ID (PK), name, location Laboratory: lab_ID (PK), name, location Bed: bed_number (PK), room_number, care_centre_ID (FK) Item: item_number (PK), description, unit_cost Treatment: treatment_ID (PK), treatment_number, treatment_name, treatment_date, treatment_time, results Relationships: Works_In (Person - Care Centre): Person (1, M) ----< Works_In >---- (1, M) Care Centre Assigned_To (Employee - Care Centre): Employee (1, M) ----< Assigned_To >---- (1, M) Care Centre Assigned_To (Physician - Care Centre): Physician (1, M)…Draw an Entity Relationship Diagram (ERD) using Unified Modelling Language (UML) notation according to the below business rules. Your design should be at the logical level – include primary and foreign key fields and remember to remove any many-to-many relationships. Business rules for hairdressers: 1. All entities should have surrogate primary keys. 2. Each hairdresser can work at multiple different salons over time, and every salon employs many different hairdressers. 3. The job title of a hairdresser at a specific salon must be stored in the database. 4. The name and surname of each hairdresser must be stored in the database. 5. The name of each salon must be stored in the database. 6. Every hairdresser is certified to have several different skills, and each skill can be mastered by many different hairdressers. 7. The name of each skill must be stored in the database. 8. The date that a specific hairdresser was certified to have a specific skill must be stored in the database.Draw an Entity Relationship Diagram (ERD) using Unified Modelling Language (UML) notationaccording to the below business rules. Your design should be at the logical level – include primaryand foreign key fields and remember to remove any many‐to‐many relationships. Business rules for a horse‐riding competition:1. All entities should have surrogate primary keys.2. Each rider may only represent a single club, but each club may enter many riders into thecompetition.3. The name of each club must be recorded in the database.4. The name and surname of each rider must be recorded in the database.5. Each rider may only ride one horse, and every horse may only have one rider.6. The name of each horse must be recorded in the database.7. A horse may compete in multiple different events, and each event will have many horsesthat compete in it.8. The name of each event must be stored in the database
- Unified Modelling Language (UML) is often used as a notation when drawing Entity-RelationshipDiagrams (ERDs) since it is a notation that software developers are already familiar with. What is the difference between a binary relationship and a unary relationship?Provide an example of each as part of your answer. Draw an Entity Relationship Diagram (ERD) using Unified Modelling Language(UML) notation according to the below business rules. Your design should be atthe logical level – include primary and foreign key fields and remember toremove any many-to-many relationships.Legal system – business rules:• In the legal system, a judge hears many cases throughout their career.• Each case can be heard by multiple judges in some circumstances.• A case has a date and title that needs to be recorded in the database.• The name and surname of each judge needs to be stored.• A judge can have multiple qualifications (with minimum of one), and eachqualification is related to only one specific judge.•…b. Draw an Entity Relationship diagram from each of the following descriptions. Include the attributes, primary keys (underlines) and the relationships in the diagram (like relationship in Access). i. Each of the department has many employees assigned to it, but each employee works for only one department. if. A customer can rent many videotapes from the video store. Each of the videotapes can be rented to many customers.Draw an Entity Relationship diagram for modeling the following system. Use relational modelling techniques in your design. You are free to make reasonable assumptions for your model unless they conflict with the definition below. Also explain your design with a paragraph. [Caution: Create your solution using paper and pen. Then put the image of your solution here. Drawing/writing with computer tools will not be accepted. Also include your name and signature in the solution paper]Problem definition: “There is a need to keep track of data for a hospital. The hospital building consists of several departments. Each department is identified with its name. For each department, the following data should also be stored: the number of floors, opening hour, and closing hour. Each department has a number of rooms. Each room is identified by its room number, but there might be rooms with the same name in different departments. At each department, many doctors and nurses can work.A doctor is…
- draw an E-R diagram that indicates the entity sets and their attributes. Identify and label significant relationship sets between pairs of entities, the degree of relationship sets and the cardinality and participation constraints.What is the purpose of entity-relationship diagrams? What sort of symbol is used to depict a connection, and how does it work? What exactly does the phrase "associative entity" imply and what does it mean? Give an example.Draw an Entity Relationship Diagram (ERD) using Unified Modelling Language (UML) notation according to the below business rules. Your design should be at the logical level – include primary and foreign key fields and remember to remove any many-to-many relationships. Astronaut mission business rules:• Every entity must have a surrogate primary key.• An astronaut lives in a specific country, and many astronauts can be from the same country.• The name for each astronaut must be stored in the database.• The name for each country must be stored in the database.• An astronaut is assigned to a mission to perform a specific role on board a specific vehicle.• An astronaut and a vehicle can be assigned to multiple missions over time.• The start date and end date of each mission must be stored in the database.• The model and name of each vehicle must be stored in the database.• The description of each role must be stored in the database.
- Use ER Assistant to draw your diagram. Draw a self-referencing entity type for the Employee entity type for which an employee is supervised by a maximum of one other employee and doesn’t have to be supervised by any employee at all. Conversely, an employee can supervise zero or many other employees. The attributes of the Employee entity are as follows: EmpNo (primary key), EmpName, EmpAddress.Draw an Entity Relationship Diagram for all of those below. Draw an ER diagram to represent information about students. A student is identified by his/her student number. Student’s name (first and last), permanent address, phone number, gender and date of birth are also stored. An airplane has a registration number, type, number of economy class seats, number of business class seats and the year of production. Some students live in student halls. Each hall has a name (unique) and an address. Each student has a number (unique) and a name. Assume that there are students living in every hall. Each text book has a unique ISBN (International Standard Book Number), and contains several chapters. Each chapter has a chapter number (unique within a book), the number of pages and the number of references. A chapter covers a single topic, but the same topic may be covered in various books. Each lecturer is identified by a unique number, name and phone. A lecturer teaches several courses, and for…Analyze the given entity relationship diagram and answer the following questions. What is the degree of “has” relationship?