Define three conditions under which it is appropriate to use a surrogate key in place of the primary key of a relation.

Q: What are three indications that a surrogate key should be constructed for the primary key of a…

A: Surrogate key is unique key and also called as synthetic primary key. Surrogate key holds anonymous…

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: ID name Courses M semester Teaches N ID name Professors Convert the above ER diagram to relations in…

A: SOLUTION -From the above Entity Relationship Diagram, we can identify three tables. They are1)…

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

A: Given data:-

Q: explanation of three situations in which a relation's secondary key should be set in place of the…

A: The detailed solution is given in the next step.

Q: (6) What are the 2 properties we need to keep in mind while doing decompositions to achieve a…

A: 2 properties are : ✓Lossless Decomposition: If the information is not lost from the relation that is…

Q: List three conditions that suggest a surrogate key should be created for the primary key of a…

A: To be determine: List three conditions that suggest a surrogate key should be created for the…

Q: explanation of three situations in which a relation's secondary key should be set in place of the…

A: Conditions to suggest a surrogate key Three conditions that suggest a surrogate key should be…

Q: relation's main key and its functional interactions amongst its characteristics are interconnected

A: Please find the answer below :

Q: What are three advantages of using a surrogate key rather than the main key to access a relation…

A: A surrogate key is a one of a type of identifier for a record or item in the table. It is comparable…

Q: 2 Consider the following functional dependencies for the given relation. R={A, B, C, D, E, F) AB->CD…

A: Dear Student, The answer to your question is given below -

Q: Computer science What is the relationship between the primary key of a relation and the…

A: The Answer is in step2

Q: Describe three scenarios when a surrogate key should replace a relation's primary key.

A: requirements for suggesting a substitute key Three circumstances indicate that a relation's primary…

Q: Three examples of when it might be appropriate to generate a surrogate key in place of the main key…

A: Main Key: In a relational database, a main key, also known as a primary key, is a column or set of…

Q: Assume a relation schema R(a, b, c, d, e, f) with primary key (a, b) and the following full func-…

A: Functional Dependencies:- Functional dependencies are the result of the interrelationship between…

Q: It is the relation among individual entities and values. O principles patterns state relation

A: In  Step 2, I have provided   correct  option-----

Q: explanation of three situations in which a relation's secondary key should be set in place of the…

A: requirements for recommending a surrogate There are three circumstances that indicate a relation's…

Q: see of representing relations as a graph or a matrix? What is one way that you might use either a…

A: A graph matrix is a square array that has one row and one column for each node in the graph. Node I…

Q: What are three reasons why the main key of a relation need to be replaced with a surrogate key?

A: substitute key: It is a key that has no contextual significance but is utilised in data analysis to…

Q: Explain three scenarios in which a surrogate key for a relation's primary key should be generated.

A: Introduction Explain three scenarios in which a surrogate key for a relation's primary key should be…

Q: If aRb ånd bRc together imply cRa. Which of the following options is/are correct? (a) If a relation…

A: The answer is

Q: Give two examples of a relation and their candidate key

A: Candidate key :                          A candidate key is a set of characteristics that uniquely…

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: Describe three situations in which a substitute key for the main key of a relation should be…

A: Given: Indicators that point to the existence of a surrogate keyThere are three circumstances that…

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: d) Both a and b . Suitable level of partitioning is found within the range of a) Tuple and attribute…

A: Actually, partitioning is splitting the database table into many tables.

Q: When it comes to relationships, what is the connection between the main key of a relation and the…

A: The connection between the main key of a relation and the functional dependencies among all…

Q: Create an unnormalized relation using student and class entities.

A: Here, we have to create an unnormalized relation using student and class entities.

Q: List three criteria that indicate that a surrogate key should be generated for the main key of a…

A: We have to write three criteria that indicate that a surrogate key should be generated for the main…

Q: just answer true/false  a]Disjointness means that every entity of a supertype must be an entity in…

A: As per bartleby guidelines we need to answer only the first 3 subparts in a question. a]Disjointness…

Q: How does the primary key of a relation relate to the interdependencies among its other attributes…

A: Answer: A primary key-foreign key relationship characterizes a one-to-numerous connection between…

Q: under what three circumstances does it become necessary to generate a surrogate key in place of the…

A: This question comes from Database Management System which is a paper of Computer Science. Let's…

Q: Describe three circumstances in which a substitute key for a relation's primary key should be…

A: Conditions for recommending a substitute key Three factors indicate that a surrogate key should be…

Q: Suppose you are going to design an instant messaging application called Telegraph. Telegraph is…

A: It is defined as a collection of information that is organized so that it can be easily accessed,…

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: Explain three cases when a surrogate key should be generated in place of the main key of a relation.

A: In data analysis, the business item is identified using a surrogate key, which is a key without any…

Q: Describe three circumstances in which a substitute key for a relation's primary key should be…

A: A main key, sometimes known as a primary keyword, is a key that is unique to each entry in a…

Q: Could you please provide an explanation of the three circumstances in which a surrogate key need to…

A: A surrogate key is a system-generated, unique identifier used to identify a record in a relational…

Q: Here are three examples of when it makes sense to create a surrogate key in place of the primary key…

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

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.