A potential key exists for a composite primary key's property. How do you feel about this news?

Q: Assume that a primary key's constituent attribute is also a candidate key. What would your answer…

A: What is primary key: A primary key is a unique identifier within a database table. It is a column…

Q: Talk about the idea of a candidate key being an element of a composite primary key.

A: Hi please find the solution below and I hope it would be helpful for you.

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: A attribute in a relation is a foreign key if the _______ key from one relation is used as an…

A: A foreign key is a key used to link two tables together. This is sometimes also called as a…

Q: Reference: A --> B--> C   QUestion?  what is the defintion of this type of relationship and what…

A: 1) A transitive relationship is a type of relationship between entities or elements where the…

Q: Which statement is true from the following: only protected elements can be inherited…

A: Option C. only protected and public elements can be inherited

Q: A candidate key is present for each of the properties that make up a composite primary key. What…

A: Given: A key is an attribute or group of characteristics that aids in the identification of a tuple…

Q: You may have both a primary key and a potential key for the same attribute.

A: Required: What do you respond if someone suggests that an attribute which is a component of a…

Q: BookID -> Author or-> Title or-> BookID

A: First Normal Form (1NF): If a relation contains a composite or multi-valued attribute, it violates…

Q: Discuss the idea that a candidate key can also be a property that makes up a composite primary key

A: Introduction: A single field or a composite expression that satisfies the criteria for a main key is…

Q: Given a Customer entity class with a CustomerId property for its primary key, which of the following…

A: Introduction The answer is in the next step:

Q: difference between a main key and a candidate key

A: Both Primary Key and Candidate Key square measure the attributes that square measure accustomed…

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: One of the properties of an IA composite primary key has a candidate key. What response would you…

A: Introduction Key Key is an attribute or group of characteristics that identifies a tuple or row.…

Q: Fill in the blank: A supertype is a generic entity type that has

A: Introduction: Below  describe the right option and incorrect option both A supertype is a generic…

Q: Define key Identifier?

A: Given: Define key Identifier An area that contains one of the following is a key identifier for a…

Q: Talk about the idea of a candidate key being an element of a composite primary key.

A: Any individual field or compound expression that might potentially serve as a main key is considered…

Q: Please produce a set of normalized relations for the following statements.

A: As here is no mention of the type of Normalization. I am writing 1NF Table: Employee emp_num…

Q: Give an illustration of what a Key Attribute is.

A: An key attribute that is part of a key or is the whole key.

Q: You may have both a primary key and a potential key for the same attribute.

A: Required: What do you respond if someone suggests that an attribute which is a component of a…

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: Talk about the idea of a candidate key being an element of a composite primary key.

A: Introduction: Each row may be uniquely identified by merging information from two or more columns…

Q: A candidate key and an alternative key are two different things.

A: A KEY is an attribute or group of characteristics in a relational database management system that…

Q: # Question 1 #Using the World database, in the city table, insert a new city for the Tasmania…

A: What is SQL: SQL is a language for interacting with databases. SQL is the standard language for…

Q: Describe the concept of a candidate key as a component of a composite primary key.

A: Required: Talk about the notion that a candidate key is a feature that makes up a composite primary…

Q: Give few special guidelines for naming attributes?

A: Guidelines for Naming Attributes: Attributes must me meaningful and unique. It is derived from the…

Q: When a numeric field is given significantly more space than the initial values that are entered into…

A: To be determined: Why is it that a numeric field is occasionally given much more space than any…

Q: Make use-case diagram:

A: Use case diagramA use case diagram illustrates a system's dynamic behavior.It incorporates use…

Q: An object is a specific instance of a class whose attribute values are the same as all other objects…

A:

Q: Explain the difference between a relationship class and a relationship instance.

A: The Relationship class describes a collection of relationships between entities, while the…

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: define attribute * lour a nswer

A: It is defined as systematic collection of data. They support electronic storage and manipulation of…

Q: When an attribute is part of a composite primary key, it's also a candidate key.

A: A candidate key is a field or expression that satisfies the requirements for a primary key. It is a…

Q: A candidate key is present for each of the properties that make up a composite primary key. What…

A: Given: A key is an attribute or combination of characteristics that enables us to identify a tuple…

Q: A composite primary key has a candidate key for one of its attributes. How would you react to this…

A: Definition: A key is a property or group of properties that allows us to identify a tuple in a…

Q: 13. Which one of the following uniquely identifies the elements in the relation? a. Secondary Key b.…

A: Given options -  a. Secondary Key b. Primary key c. Composite key d. Foreign key

Q: Digital Wallet: the access control rule for the class Transaction and boundary use case for the…

A: Let's delve deeper into each aspect, starting with the access control rule for the Transaction…

SQL

SQL stands for Structured Query Language, is a form of communication that uses queries structured in a specific format to store, manage & retrieve data from a relational database.  

Queries

A query is a type of computer programming language that is used to retrieve data from a database. Databases are useful in a variety of ways. They enable the retrieval of records or parts of records, as well as the performance of various calculations prior to displaying the results. A search query is one type of query that many people perform several times per day. A search query is executed every time you use a search engine to find something. When you press the Enter key, the keywords are sent to the search engine, where they are processed by an algorithm that retrieves related results from the search index. Your query's results are displayed on a search engine results page, or SER.