) 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: Give three examples of when it would be appropriate to use a surrogate key instead of the primary…

A: requirements for suggesting a substitute key There are three circumstances that indicate a…

Q: Can the foreign key be extracted from another table that is not connected to it in entity…

A: Foreign keys are a part of table which are being sourced from some column in a different table.

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: By giving an example, define the following terms: A. Coding B. Relation and Relationship

A: Given data:-

Q: Translate the E/R diagram that you draw in the previous question into a set of relations, clearly…

A: Given Figure :-

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: The following Entity-Relationship diagram has two entity types and one relationship type. There are…

A: The given ERD diagram fails to the capture the following aspects in toto or incompletely or…

Q: Expertise Degree Name PersNr Doctor Treats Worker is a M Name Nurse Patient PatientNr Skills Illness…

A: is_a Relationship -  One entity type might be a subtype of another--very similar to subclasses in OO…

Q: Can we make an ER diagram for flower shop with explaing each relations? 1.  Shipped items can be…

A: Detailed Explanation: Entities and Attributes The entities represent the core components of the…

Q: A candidate key is a characteristic possessed by a composite primary key. What is your response to…

A: The statement you provided is not accurate. A candidate key and a composite primary key are…

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: Which one is correct Consider the following ER diagram depicting the relationship of an employee and…

A: To Do: To choose the correct option.

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: Describe how the relationship (1:M) of an E-R diagram is transformed into relations

A: Relations:: The entity relationship (ER) information model has existed for over thirty five years.…

Q: How can we define relation? Identify the characteristics that make up a relation.

A: The table in the relational database or the relationships created between the same tables using…

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

A: ERD :

Q: What are the relationships and their meaning in the movies E/R diagram? name hometown title year…

A: As per our guidelines we are supposed to answer only one question. Kindly repost other questions as…

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: 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: relationship between the entities(did not show the relationship) and the contraints

A: The solution for the above-given question is given below:

Q: Describe the most common way in which relationships in an E-R diagram are expresses in a…

A: ER  diagram ER  diagram is defined as the interconnection of entities and attributes how they are…

Q: ✦ Converting schema model from ER model, an additional table is made in case of many to many…

A: ER diagram is converted into Relational model in which each entity is converted into a table and all…

Q: Translate the E-R diagram on page 1 (diagram) to database schema using MySQL Workbench (export as…

A: An Entity Relationship (ER) Diagram is a type of flowchart that illustrates how “entities” such as…

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: In the space provided below the following ERD, transform the following M-N relationship into an…

A: ERD: ERD stands for Entity Relationship Diagram. This is a diagram which is used to show the…

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: Draw the E/R diagram. Use an arrow in the direction of any 1 in the cardinality. This has the sense…

A: Here's how we can model this library system with an entity-relationship diagram (ERD): Entities and…

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: 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: A binary relationship that is one-to-many in an ERD is best represented by adding the primary key…

A: Lets see the solution.

Q: Describe how functional dependencies may be used to denote the following: • The entity sets student…

A: Functional dependency is a relationship that exists between two attributes. It typically exists…

Q: Deacribe relationship between primary key of a relation and the functional dependencies among all…

A: To be determine: Describe relationship between primary key of a relation and the functional…

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: Discuss the classification of traceability relations; elicit a brief example that describes the…

A: Introduction: Traceability relations are defined as the degree to which a relationship can be…

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

A:

Q: Three instances in which a surrogate key should be constructed for the relation's primary key

A: The following are some of the reasons for creating a surrogate key: When gathering dimensional data…

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.