Review Questions QUESTION 4 Key Constraint is violated when a given value of an attribute is not of the suitable data type: O True O False

Q: Explain why an index is only effective when an attribute's values cover a suitable range of values.…

A: using a variable index with an extensive range of values An index in computing is a table or other…

Q: age gender customer ID Customers first_name name zip code last_name makes total transaction_date…

A: 1. Customers Relation (i) Name of the relation: Customers (ii) Names of its…

Q: What are AttriButeS produced from StOred verSuS?

A: Attributes produced: The features that define a product are known as product attributes.  They…

Q: How are attributes implemented?

A: Ans-:   Аttributes  аre  used  in  С#  tо  соnvey  deсlаrаtive  infоrmаtiоn  оr  metаdаtа  аbоut…

Q: Explain why an index is only useful if the values of an attribute are different enough.

A: Introduction Use of an index with a wide range of values A file index is a table or other data…

Q: In an ERD, entities do not have columns. Instead which of the following is used to describe the…

A: In the intricate world of data modeling, where the digital realm mirrors the complexities of the…

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: What is the difference between an attribute with numerous values and a recurring group?

A: An attribute is fields that may be originate in a database management system (DBMS). Constituent of…

Q: Explain why an index is only useful if the values of an attribute are sufficiently varied.

A: Introduction: In computing, an index is a table or other data structure that is used to determine…

Q: First normal form (1NF) requires that the domain of an attribute may contain only. A) Key values B)…

A: First Normal Form also known as (1NF) is Said to be one of the normalization rules in relational…

Q: Is it possible for composite attributes to be part of composite keys?

A: In this question we need to explain whether composite attributes can be part of composite keys or…

Q: What variables influence relationships, and how do they function?

A: The various kinds of relationship characteristics will be discussed in this article.

Q: A potential primary attribute is a constituent element of a composite primary key.

A: In database management systems, a primary key is a unique identifier for each record in a table. It…

Q: Explain why an index is only helpful if the values of an attribute are sufficiently varied

A: Introduction Use of an index with a wide range of values A file index is a table or other data…

Q: Explain why an index is only useful if the values of an attribute vary sufficiently.

A: Introduction: Use of an index with a range of values

Q: Explain why an index is only helpful if an attribute's values cover a suitable range. This is the…

A: The above question is answered in step 2 :-

Q: Does it matter what composite attributes you use to determine whether you may use composite keys?

A: A composite key is a key that consists of two or more attributes that together uniquely identify an…

Q: Conditions that signal to the database designer that supertype and subtype relationships should be…

A: When a generic object is connected to more than one subtype, it is a super-type. Entities within an…

Q: A prospective key is an attribute that is part of a composite primary key.

A: One primary key is a composite one.   The primary key in database management systems consists of two…

Q: A_ _is a property of the entire relation, rather than of the individual tuples in which each tuple…

A: 1) A key in DBMS is an attribute or a set of attributes that help to uniquely identify a tuple (or…

Q: 105. The type of constraint which states that not even a single value with primary key can be a null…

A: Please see the next step for answer.

Q: A prospective key is an attribute included in a composite primary key.

A: In the realm of database design, keys play a vital role in establishing relationships and ensuring…

Q: Does the choice of composite characteristics affect when deciding whether composite keys are…

A: The choice of composite characteristics can indeed influence the decision of whether composite keys…

Q: Can a composite attribute be part of a composite key

A: Composite attribute as a composite key Composite attribute is a attribute that contains more than…

Q: Explain why an index is only useful if the values of an attribute span an appropriate range of…

A: Use of an index with a range of values An index is a table or other data structure that is used to…

Q: Recognize when to use supertype/subtype relationships in data modeling.

A: Data Modeling: The process of creating a data model for the data to be stored in a database is…

Q: A candidate key is a characteristic that is included in a composite primary key.

A: A primary key is a key in each tuple which is unique for each tuple present in the table.

Q: According to another non-key attribute, what is the connection between the primary key and a non-key…

A: The term "functional dependence" refers to the relationship between two features. A relationship,…

Q: Explain the constraint between two attributes?

A: A set of constraints between 2 attributes in a relation is known as functional dependency.…

Q: What exactly is a derived attribute? Please provide an example. What are the benefits and drawbacks…

A: The answer :

Q: A "candidate key" is: any set of fields that determines the values of all other fields functionally…

A: Let's break down the other options:"any set of fields that determines the values of all other…

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: What does the term "Attributes" mean?

A: Introduction: Whenever we are working with or programming computers, an attribute refers to a…

Q: Task 4: As a part of marketing strategy, the Marketing team continuously conducting an advertising…

A: Actually, database is a used to stores the data.

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.