1)A tuple is a named column of a relation. True or alse 2)Each attribute in a relation has a distinct name. T/F 3)The degree of a relation is the number of attributes it contains. T/F 4)A foreign key is the candidate key that is selected to identify tuples. T/F

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: What is the most common method of specifying a primary key in a relational schema description?…

A: Method of specifying primary key in relational schema

Q: Display employees (by name and address) from "Chicago" and with an annual salary between 60000…

A: The database management system is a collection of data and information and SQL languages are used…

Q: Explanation of three cases when it makes sense to create a secondary key instead of the main one in…

A: The three cases when it makes more sense to create a secondary key instead of using the main key in…

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: re three reasons why the main key of a relation has to be replaced with a surrogate key?

A: Here are three reasons why the main key of a relation has to be replaced with a surrogate key.

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: Atuple in a database is: A A field. A record, An entity. A relation C D

A: A tuple is a row also known as one record stored in table.

Q: The relational schema shown below is part of a hospital database. The primary keys are highlighted…

A: (1) List all the patients’ details, alphabetically by name. SELECT * FROM Patient ORDER BY patName…

Q: Mapping: Create relational schemas for the ER diagram given below. Indicate clearly the primary and…

A: The processes to generate the relational schemas for the provided Entity Relationship diagram are…

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: Using this unnormalized table and the five functional dependencies and third normal forms. In other…

A: To find the normal forms for the given functional dependencies, we need to check each normal form…

Q: 1. Display employees (by name and address) from "Chicago" and with an annual salary between 60000…

A: The given problem has a set of tables with primary keys and foreign keys identified in each table…

Q: Department: (DID, Department_Name, City, budget) Works IN: (EID, DID, Annual_Salary, Start_Date)…

A: T1: π(Employee_name, Annual_Salary) (Employee ⨝(Employee.EID = Works_IN.Employee_ID) Works_IN…

Q: 1)A tuple is a named column of a relation. True or alse 2)Each attribute in a relation has a…

A: Since you have asked multiple question, we will solve the first 3 questions for you. If you want any…

Q: Employee: (EID, Name, City, Address) Department: (DID, Department_Name, City, budget) Works IN:…

A: All the above details that are mentioned above in the question we will take to solve the question:…

Q: Q1. Create these two relations, then insert the tuples. (Instructor relation: ID is PK, dept_name is…

A: Answer

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: In what normal form is the LOTS relation schema in the Figure with respect to the restrictive…

A: The relationship data, if it is in a first NF and all non key depend on primary attribute. Then the…

Q: Indicate all the functional dependencies and the normal form for each relation

A: The functional dependencies are the unique relationships between the attributes. For the table given…

Q: Implement a new independent entity phone in the Sakila database. Attributes and relationships are…

A: All lower case Underscore separator between root and suffix Foreign keys have the same name as…

Q: Course evaluation must have a student, the students relation contains a unique student id, full name…

A: An Entity–relationship model (ER model) describes the structure of a database with the help of a…

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: The value of the candidate key cannot uniquely identify each tuple in a relation. True O False…

A: 1. The Value of the Candidate key is used to Identify the unique tuple in the relation. Your Answer…

Q: Implement a new independent entity phone in the Sakila database. Attributes and relationships are…

A: There is only one error in the above code and that is the ALTER TABLE command on the address table.…

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

A: The primary key of one table is referred to by another table's foreign key, which is an attribute of…

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: QUESTION 5 A functional dependency is a relationship between or among : Attributes Rows Entities O…

A: Here in this question we have asked that a functional dependency is a relationship between or…

Q: 19. The ______ is the one in which the primary key of one relation is used as a normal attribute in…

A: Referential relation is the relationship that can be defined between two tables using common…

Q: Indicate all the functional dependencies and the normal form for each relation. Decompose your…

A: Indicate all the functional dependencies and the normal form for each relation. Decomposeyour…

Q: What is an unnormalized relation? Is it a relation according to the definition of the word relation?

A: In a database management system, a relation is a collection of interconnected tables or a single…

Q: Implement a new independent entity phone in the Sakila database. Attributes and relationships are…

A: SQL: Database management is done using a programming language called SQL, or Structured Query…

Q: 3. a) A relation that does not have a composite primary key still has partial functional dependency.…

A: Answer: Answer -3(a): The correct answer is 1. TRUE Explanation:  Yes, the relation is uniquely…

Q: 15. A table is said to exhibit referential integrity if: a. it has no foreign key. b. it has a…

A: A table is said to exhibit referential integrity if : it has a foreign key, and all the foreign key…

Q: For 1 through 4, state whether the statements are True or False (Do not provide any explanation or…

A: This question is a simple true and false question in which we have to state either true or false and…

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.