) i). Name and explain the type of relationship the relations in figure 2 depict.  ii). Using figure 2, explain how one can uniquely identify the record of a particular student in the room relation.  iii). Using appropriate symbols, transform the relations into equivalent well –labelled E – R diagram.

Q: Develop ERD (Entity Relationship Diagram) for one of the following two scenarios. NOTE: No further…

A: Answer: We have drawn the the Entity relation diagram  for the one of the following so we have done…

Q: Q. A/ Consider a STUDENT relation with the following attributes (St ld, St Name, St_Stage, Average,…

A: In order to design the student table with with attributes St_id (which is the student id), St_Name…

Q: Regards to the diagram below (figure 4.12), answer the following questions using the multiple-choice…

A: The answers for the following question can be derived from the diagram given. How is of_type…

Q: Justify how the main key of a relation is connected to all of the qualities of the relationship in…

A: Introduction: A primary key is a database characteristic that uniquely identifies a record. It's…

Q: ith an example.

A: Key Attribute A key is a data item that is used to identify a record in a database or a value that…

Q: Demonstrate that if a relation contains no property that is functionally determined by all of the…

A: Introduction   Show that if a relation has no attribute that is functionally determined by all the…

Q: Help normalize this into 4NF and make a diagram please? Or just explain the relations I should do.…

A: Here are the problems in existing table / relation: - Address and email are combined into a single…

Q: Consider a relation (A, B, C, D, E, F, G) with functional dependencies as given below: ABC D ED-F…

A: Consider the following relation with set of functional dependencies: R (A, B, C, D, E, F, G)…

Q: Give an example of how attributes are used in a relationship model, and what the generic term for an…

A: Entities in the ER model contain characteristics that may be single-valued, multi-valued, composite,…

Q: Explain the relationship between the primary key of a relation and the functional dependencies that…

A: Introduction: A primary key is a database characteristic that uniquely identifies a record.

Q: Create an entity relationship diagram and the relational diagram to show relationship between all…

A: ERD :

Q: 12. Which four types of relationships are valid in Use case Diagram a. Association b. Generalization…

A: Different relationships show connections and interactions between distinct elements in a use-case…

Q: What are three signs that a surrogate key should be generated for the primary key of a relation…

A: A surrogate key is one that serves no practical or operational purpose. It's "artificial" and made…

Q: Explain the connection between a relation's primary key and the functional dependencies that exist…

A: A primary key is an attribute that identifies a record in a database. It is used to filter data…

Q: Give a Relational Model that corresponds to the Entity-Relationship Diagram in Figure 1. You must…

A: Relational Database schema is given below :

Q: Design an Entity-Relationship for each system described below. Use the (min,max) notation. State…

A: An entity is the relationship model which describes the interrelated things in a domain. A basic ER…

Q: Describe how the weak entity of an E-R diagram is transformed into relations

A: E-R (Entity Relationship) diagrams: An entity-relationship diagram is an image or snapshot of the…

Q: How do you map a "One to Many" relationship when mapping ER Diagram to Schema

A: To map one to many relationships, the primary key on the `one side' of the relationship is added to…

Q: Also, develop a model of the proposed database systems using the Entity Relationship (E-R)  model…

A: ER Diagram Entity Relationship Diagram is a diagram that shows the relationships between entity…

Q: Define three conditions under which it is appropriate to use a surrogate key in place of the primary…

A: Prerequisites for the suggestion of a surrogate key. There are three circumstances that indicate it…

Q: Please convert the question to an entitty relationship diagram with 1:M labels, and shapes. E.g.…

A: E-R diagram:  An entity relationship diagram (ERD), also known as an entity relationship model, is a…

Q: Consider a relation X with six attributes WYSMFE where WS is a composite primary key for X. Assume X…

A: The handwritten solution is provided below:-

Q: Build an entity-relationship diagram, deriving relations and validating relations using…

A: entity-relationship diagram

Q: Below are three situations where a surrogate key could replace the relation's primary key.

A: - We need to talk about three situations where a surrogate key can replace a relations primary key.

Q: Describe how the multivalued attribute of an E-R diagram is transformed into relations

A: Multivalued attributes are represented by double ovals in an ER diagram.

Q: C1. "Nomadic Desert Camp, Oman" requires an Information System to maintain the details of the…

A: The given scenario is related to an  amusement booking system for which an ER diagram has been…

Q: Give a Relational Model that corresponds to the Entity-Relationship Diagram in Figure 1. You must…

A: Entity Relationship diagram mainly contains 3 components, that are Entities, Relationships and…

Q: Transform an E-R (or EER) diagram into a logically equivalent set of relations.

A: A well-structured relations are obtained when remodeling EER diagrams into relation. But a…

Q: What is the purpose of entity-relationship diagrams? What sort of symbol is used to depict a…

A: Given: What are entity-relationship diagrams used for? What kind of symbol is used to represent a…

Q: Describe how the composite attribute of an E-R diagram is transformed into relations

A: Given: Describe how the composite attribute of an E-R diagram is transformed into relations…

Q: use draw a simple    diagram of any two entities linked    via relationship. On one of the…

A: ER Diagram: The relationships between entity sets that are kept in a database are depicted in a…

Q: Many to many relationships (a non spcific relationship) are resolved into a pair of one-to-many…

A: Many to many relationships (a non spcific relationship) are resolved into a pair of one-to-many…

Q: Here we explain three cases when it makes sense to use a surrogate key in lieu of the relation's…

A: In certain scenarios, using a surrogate key instead of the main key of a relation can be a sensible…

Q: Convert any E-R diagram in a Relation.

A:

Q: Which of the following statements is true about the above E-R diagram? I. The attribute G will be…

A: The given diagram is entity relationship diagram that has entities and relationships among the…

Q: xplanation of the entity-relationship model's op

A: INTRODUCTION: In a given topic of knowledge, an entity-relationship model (or ER model) represents…

Q: 2. When a student's grade is changed, we need to record information on the teacher who changed the…

A: In this question we have to understand and explanation of how to record information on the teacher…

Q: Make up a scenario from a subject/industry area of your choosing, and invent a single relation that…

A: Given question has asked to make up a scenario and show a single relation that has at least one…

Q: What is an exclusive subtype relationship? Give an example other than one shown in this book. Draw…

A: Exclusive subtype relationship: Each instance of the supertype may only apply to one subtype in an…

Q: e draw diagram. Dont copy that is repeatable.  I would downvote for copied content.

A: Here I'm giving you a picture of ER-Diagram which I've made according to your requirement and even…

Enhanced ER Model

The enhanced ER model is an abbreviation for Enhanced Entity-Relationship (EER) model. As you know, the entity-relationship (ER) model is a pictorial illustration of the relationship between various entities of a domain. In the case of a large amount of data with multiple interrelated entities, the ER diagrams become complex and tough to interpret. For such cases, the need for enhancement in the ER model was observed, and thus, the EER model was designed.