Which of the following is NOT a property of a relation? Tick all that apply. [ ] Each cell in a relation cannot contain multiple values. [ ] Order of tuple is important. [ ] The name of a relation is unique. [ ] Values of an attribute from the same domain.

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: 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: 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: explain the relation between them VERY BRIEFLY: => [span and live time], [scope and principle of…

A: Lets see the solution.

Q: TRUE or FALSE - A super-entity can only have two sub-entities and no more.

A: A SUPER-ENTITY CAN HAVE MORE THAN TWO SUB-ENTITES

Q: Type ISBN eBook RelationName2 (AttrName1) Primary key {AttrName1) Price Book N Order Hardcopy Date…

A: Here are the resulting relation tables from the given E-R diagram:Table Book:Primary Key:…

Q: Computer science What is the relationship between the primary key of a relation and the…

A: The Answer is in step2

Q: Create ERD or EERD of local school library with these requirements, and write relation schema…

A: answer is

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: 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: Which one of the following statement is not true: A complex object is formed by combining other…

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

Q: What conditions allow a relation's attribute to have a changeable length?

A: According to the question, we have to answer that what conditions allow a relation's attribute to…

Q: The following functional dependencies describe a relation that is in 2NF. Customer_ID, Store_ID ->…

A: Definition of 2NF is => There should not be any partial dependency. Partial Dependency means Part…

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: Which is the process of breaking a relation into multiple relations: a. Functional dependency b.…

A: This mcq is related to RDBMS.

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: 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: 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: 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: It is important to build a hybrid merge-join technique in order to accomplish the task of combining…

A: The hybrid merge-join technique is a method used in database systems to combine two relations that…

Q: The following relations kind a part of a on-line database (the relations area unit…

A: Due to the honor code, I can help you with 1st part. For 2nd part resubmit the question   From the…

Q: A) The following relations kind a part of a on-line database (the relations area unit self-…

A: The physical ER(Entity-Relationship) diagram is it is physically connected with the database schemas…

Q: Transform the ER Diagram given above into Relational Schemas.

A: Relationship between Library and Book is 1:M. So we need to include primary key of Library into…

Q: • Students(stulD, lastName, firstName, major, credits) • Faculty (facID, name, deptName, rank) •…

A: The original query attempts to retrieve the class numbers of all classes taught by a faculty member…

Q: What is the connection between the primary key of a relation and the functional relationships that…

A: Introduction Functional dependency: A connection between two qualities is termed functional…

Q: Draw the arrow diagram for the following relation. The domain of relation is a group of four friends…

A: SOLUTION -     Given that in a given domain which consists of four friends, there is a relation H.…

Q: 8 Which of the following relationships models the following statement: "My friends have nice cars" *…

A: To Do: To identify the relation.

Q: Assume a user creates a new relation r1 with a foreign key pointing to another relation r2. What…

A: If a user creates a new relation r1 with a foreign key pointing to another relation r2, the user…

Q: UNION, INTERSECT, and MINUS work properly only if relations are union-compatible, which means that…

A: The given statement is: Union, intersect and minus work properly only if relations are…

Q: 5.6 LAB - Implement independent entity (Sakila) Implement a new independent entity phone in the…

A: First check whether phone_id column exists in your customer, staff, and store table or not. If…

Q: database Assume that you have the following relation; R(a,b,c) a   b  c ---------- 1  A   F 2…

A: Division operator A÷B can be applied if and only if: Attributes of B is proper subset of Attributes…

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.