Q1: Please describe the concept of (1) Schema, (2) Primary Key and Foreign Key used for database system. Except the listed 6 algebra operations such as select, join/intersection, project, ... is there any potential algebra operand may/can be used for database management processing.

Q: Subject : Database Management System Question: b. Explain natural join with example.

A: Natural Join: The SQL NATURAL JOIN is a type of EQUI JOIN and in natural join two tables structure…

Q: List, in alphabetical order, the names of all patients who had consultations after 01 January 2018.…

A: 6.2   Select pt.Pat_Name ,cs.Con_Date FROM patient pt JOIN Consultation cs ON pt.pat_id=cs.pat_id…

Q: Describe an entity, an entity type, and an entity set in a database management system?

A: Entity: The entity is an object, place, or thing which has its independent existence in the real…

Q: DB design and is expected to change frequently is: O 1. Database Extension O 2. Database Intension O…

A: 1) DB Design and is expected to change frequenty Database intension or database schema are set of…

Q: uestion Consider the following database schema. CUSTOMER (CID, NAME, STREET, CITY, STATE, AGE) SALE…

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Q: Task 2 Using the scenario, produce Design Documentation for Plug-Ins Electronics. Your database…

A: Er diagram or entity relationship diagram gives a brief lookout for all the entities present in a…

Q: What exactly is a database relationship? With the use of examples, define Cardinality and Modality…

A: Introduction: An organized collection of data that can be maintained and accessed easily, is called…

Q: QUESTION 3 A USE statement is not required when Session is already in the context of the database…

A: - The question wants to know when is the use statement not required.   - A use statement is used to…

Q: Define and discuss the advantages & disadvantages of materalized view in database?

A: Materialized View:- Unlike normal VIEWs, the materialized views are specific views that take on…

Q: discuss and elaborate what is the purpose of using views and how it will affect the database…

A: Views of a database schema are generated for a particular query, to extract a particular set of…

Q: Assume that you have to design a databaseto manage books issued by your universitylibrary.…

A: Primary key column has unique data. It uniquely identifies record in a relational database table.…

Q: You can use either an E-R diagram or DBDL to represent the structure of a database. Which approach…

A: E-R diagram: - ER diagrams are used to examine existing databases to find and solve problems in…

Q: ID library_item title N publishes magazines journal conference_proceeding book publisher date_of…

A: Primary key attributes- magazines- date of publish, date, id journal-volume, number, id book -…

Q: perators discussed in this chapter. Also show the result of each query as it would apply to the…

A: The given problem is related to database SQL queries where the database and sample data is given.…

Q: Question 3 a) Normalize table 1 to a set of Third Normal Form (3NF) relations. Your answer should…

A: Primary key for the given relation is, (PatientID , DiseaseID) The Fd's possible are PatientID…

Q: Given the ER diagram below, create relation schemas to capture the database design.

A: Database Management System(DBMS) is a software for storing and retrieving users data while…

Q: SUBJECT: DATABASE MANAGEMENT SYSTEM   QUESTION NO 1: Suppose you assigned a task to design…

A: In multi part question we are allowed to solve only one sub part please repost second question.…

Q: ERD (Entity relationship diagram)

A: Given :- An ERD (Entity relationship diagram) is given in the above given question   Need to write…

Q: Explaining the necessity for and benefits of normalisation in database design. include the…

A: Normalization is a database design technique that organizes tables in a manner that reduces…

Q: 1. Identify the candidate and foreign keys in the schema. Explain how the entity and referential…

A: Identify the candidate and foreign keys in the schema: CENTER TABLE - an independent table with…

Q: A) Let suppose if you are a database designer, and if you were designing a Web-based System to make…

A: So, for a coffee shop web based platform, We can have the below few entities and relationship…

Q: Discuss the role and requirement of each model (conceptual , logical and physical ) used in Database…

A: This Information Demonstrate characterizes WHAT the framework contains. This demonstration is…

Q: The following exercises are based on the BITS database user views as designed in Your Turn 6-1 in…

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Q: hat is the candidate key of this relation?

A: Database Systems Question 5. A relation R is given which is R(A,B,C,D,E). It has the following…

Q: Exercise 3.1 Define the following terms: relation schema, relational database sch domain, attribute,…

A: Explanation: Relation Schema: Relation schema describes the layout and construction of the relation,…

Q: Create a relational database schema from the ERD in 3.1 showing all tables in 3NF. Each table should…

A: A schema is simply a list of each table name and its fields/attributes in a database as in the…

Q: QUESTION 3 Which of the following is True about Relational Database Modeling? O a. It is a physical…

A: True about the relational database and one to many relationship between customer and product table

Q: Question 48 (1 point) In order to improve the performance of a database used primarily used for…

A: Answer 1: True. Denormalization can improve performance by: Minimizing the need for joins…

Q: 1. Provide an example of different "views", and describe where these can be found in the three-layer…

A: -Our guidelines binds us for first question only.    - The first question is to provide the examples…

Q: There are several attribute relationships, including partial dependency and transitive, give an…

A: 1.about partial dependency and transitive, 2.The normalization stage in database design, especially…

Q: 1- The following figure present BANK ER diagram. Map it into a full relational schema. Specify all…

A: Mapping into full relationship schema and specifing the pk and fk has shown in step2

Q: Subject:DataBase Management System Write answers: a.Differentiate between high level language and…

A: The main difference between the high-level language and low-level language is that the programmers…

Q: A. What problems are likely to arise if the logical design of the relational database is created? B.…

A: A. What problems are likely to arise if the logical design of the relational database is created?…

Q: 2.4.14 Exercises for Section 2.4 Exercise 2.4.1: This exercise builds upon the products schema of…

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Q: Question 4, Page 281 Concepts of Database Management, 9th Edition ISBN: 978-1-337-09342-2…

A: Problem requirement: The company needs to add an reservations from sports clubs. So, one need to…

Q: QUESTION 4 Convert the following ER diagram into a relational database schema, be certain to…

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Q: 2.1) Identify (write down) all relationships and their cardinality and write the corresponding…

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Q: n to indicate primary keys and referential integrity constraints.

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Q: Define and discuss the advantages and disadvantages of materialized views in databases.

A: A view in a database is a query that defines a virtual table i.e. a view created using a query in a…

Q: Create a set of Tables in 3NF. Underline the Primary Key(s) for each table. Considering labeling…

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Q: A) Let suppose if you are a database designer, and if you were designing a Web-based System to make…

A: DBMS architecture: There are three levels in DBMS architecture: External level/view level -…

Q: a) Why is normalization important in database design?

A: Actually, Normalization is the process of organizing the data in tables in such a way that the…

Q: What are multivalued attributes, and how can they be handled within the database design? Questions…

A: What are multivalued attributes, and how can they be handled within the database design?

Q: urgent The below entity consist one of multivalued attribute.  Identify the multivalued attribute…

A: The given problem is related to database design and the requirement is to analyse the given entity…

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.