What does it mean to be related? How do you define a relation's properties?

Q: Question 6 In order to make it easier to compare the relation scheme diagram to the UML diagram, we…

A: In order to make it easier to compare the relation scheme diagram to the UML diagram, we (check all…

Q: Based on the properties of a relation, explain why the following is not an example of a relation:…

A: The given table has duplicate rows. Row1 and 2 are duplicated Row 4 and 5 are duplicated

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: Vendor order (vendor no, order no, vendor name, qty provided, price/unit) is a second normal form…

A: Vendor order data is an essential component of many business processes, and it is important to have…

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

A: Given data:-

Q: What are the conditions under which an attribute of a relation may have a changeable length?

A: Introduction: An attribute is defined as a trait or characteristic found in a person, a place, or an…

Q: What are the differences between weak and strong entity sets?

A: An entity set is a compilation of similar types of entities. Entities are a crucial idea in…

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: What is Ternary Relationship?

A: Given: What is Ternary Relationship?

Q: A foreign key can refer to only the candidate key of another relation. (a) True (b)False

A: A foreign key is a field or a set of fields (columns) in a relational database table that is used to…

Q: A relation cannot have: Multi-values attributes Several super-keys O Composite attributes Attributes…

A: Answer:

Q: Consider the following dependency diagram: A B D E F a. the relationship between attribute A and…

A: According to question we have to  Consider the following dependency diagram and answer following…

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: design an Enhanced Entity Relationship (EER) diagram Topic: Locomotives The ERR diagram should…

A: entities of system : PaperBook, ElectronicBook, Users, borrowing_transactions Attributes of…

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

A: The question has been answered in step2

Q: How relation listening important?

A: The relationship that is built between people when they communicate is the focus of relational…

Q: Give examples of relations that are: (a) reflexive and symmetric but not transitive (b) reflexive…

A: (a) Reflexive and symmetric but not transitive:   Let's consider a set A = {1, 2, 3}, and define a…

Q: List all of the many properties that the Entity-Relationship (ER) model has.

A: 1. Describe the different kinds of characteristics in the Entity-Relationship (ER) model. Solution:…

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: Write a relation from a given digraph. b) Determine properties. c) Write in a matrix form.

A: Consider the given digraph:

Q: An attributes in a relation coming from another relation is called: * O foreign key fields…

A: An attributes in relation coming from another relation is called

Q: Description of three circumstances in which it is appropriate to generate a replacement key for the…

A: In computer code engineering, incremental Development might be a process that stresses the value of…

Q: What does it mean to be related? How do you define a relation's properties?

A: Relation is a property of set that we study in discrete math. Two set be said as related when it…

Q: How does a relation's primary key affect its attributes' functional dependencies?

A: Introduction: Relational databases are widely used in modern computing systems to store and manage…

Q: Computer science Explain how the primary key in the same relation is referenced.

A: Introduction: The primary key constraint requires that each row in the relational database…

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: How do you know whether to convert a relationship to an associative entity type?

A: These entities are used when user wants a relationship to be mixed in a relationship.For example…

Q: An explanation of the three circumstances in which the secondary key of a relation should be used…

A: Indicators that point to the existence of a surrogate key There are three circumstances that point…

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: What is a simple (or atomic) attribute?

A: The simple values are the atomic or unique values which can not be modified or altered further.

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: True or False: Every primary key of a relation is a superkey    No hand written and fast answer…

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

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: BANK Code Name Addr Phone BRANCHES ACCTS Acct no San Balance ACCOUNT A.C Name CUSTOMER Type BANK…

A: Relational model corresponding to given ER Diagram of Bank database systems:   1. BANK(Code, Name,…

SQL Query

Structured Query Language is the full form of SQL. It is one of the standard languages to deal with the relational database. It is used to insert, update, delete, and search the records stored in a RDBMS. The relational databases are created and managed by using SQL.