Under what circumstances can a relation have duplicate rows?

Q: relation geocode(id, thana, district, division) is a small relation and size is 40KB, There are 100…

A: According to the question , We have to explain how given relation will be stored as per the above…

Q: The degree of a relation is the number of its columns. True False

A: Defined the given statement as true or false

Q: Given a relation R (A, B), we cannot assign multiple values at column A in a single tuple. True O…

A: Given: Declare true or false.

Q: In mathematical term Table is referred as a. Relation b. Attribute c. Tuple d. Domain

A: In mathematical term Table is referred as a. Relation b. Attribute c. Tuple d. Domain

Q: Explain how referential integrity is represented in relational model?

A: Referential integrity means the values of a column in one table is referred by another column in…

Q: What problems might arise from vertically partitioning a relation?

A: Issues of vertical partitioning Vertical Partitioning: The separation of the logical_ relation…

Q: List all functional dependencies satisfied by the relation shown in the figure. Q R 1 3 4 2 4 5 1 3…

A: the only functional dependency available in this given relation is

Q: Write a detailed contrast between "Relation" & "Relationship" in Dbms

A: Relation refers to a single table in DBMS whereas relationship refers to how two tables are…

Q: Create a form of the hybrid merge-join method that is appropriate for the situation in which both…

A: Hybrid merge join algorithm is a version of the merge join procedure, which is done on unsorted…

Q: Explain references the primary key in the same relation?

A: The primary key constraint is that each row in the relational database management system table is…

Q: Computer science Explain how the primary key in the same relation is referenced.

A: Introduction: The primary key constraint requires that each row in the relational database…

Q: | functional dependencies, normalize the original and all re to use proper relational notation:…

A: Step by step with explanation is given below

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: is the number of attributes/fields in a relation. a. Degree b. Cardinality O c. Tuple d. Row

A: Degree: In DBMS, degree is the number of attributes or column present in the table Cardinality: In…

Q: To remove a relation from an SQL database, we use the ______ command. a) Delete b) Purge c) Remove…

A: Given: To remove a relation from an SQL database, we use the ______ command.a) Deleteb) Purgec)…

Q: Give an example of a table that is not a relation (other than one from this chapter).

A: Given:   Give an example of a table that is not a relation (other than one from this chapter).…

Q: Question 9: The maximum number of superkeys for the relation schema R(E,F,G,H) with E as the key is…

A: The maximum number of superkeys for the relation schema R(E,F,G,H) with E as the key is 8. Option 4…

Q: PLZ help with the following: IN SQL Let R (A, B, C) be a relation schema. What happens if we…

A: Relational schema refers to the meta-data that describes the structure of data within a…

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: Suppose there is a relation: Student(Name, rollno, cgpa, adress, phone) 1.Write a SELECT query to…

A: 1. Select * from Student where Name="Anum";  2. Select Rollno from Student where cgpa<3 ; GroupBy…

Q: In SQL, foreign key constraints can reference only the primary key attributes ofthe referenced…

A: For many-to-many instance, the relationship should be represented as the distinct/separate relation…

Q: Hotel(hID, hName, city) primary key is hID Guest(gID, gName, gAddress) primary key is gID Room(hID,…

A: Select guests who stayed at least 1 day in New York City hotels between September 8, 2001, and…

Q: cher(ID, name, S ary key of the re ary of the relatic relation is 300 a maximum size

A:

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: Let's say a user establishes a new relation r1 that has a foreign key that points to another…

A: Introduction: A foreign key (FK) is like a column or collection of columns that is used to create…

Q: Suppose that we have a relation marks(ID, score) and we wish to assign grades to students based on…

A: SELECT query can be used to find the number of students with each grade. SQL WITH clause can be used…

Q: Suppose a relation contains partial dependencies. At most, what normal form would it be? Select one:…

A: The correct answer is

Q: A table that contains a repeating group is a(n) unnormalized relation a O 1st NF b O normalized…

A: Lets see the solution.

Q: Suppose a single relation (table) is used to record the information about students’ enrollment in…

A: Actually, given question regarding normalization.

Q: 1.Write a SELECT query to find all the data of students with name Anum.

A: Select * from Student where  Name="Anum"

Q: w many partial dependencies exist in the relation? v many full dependencies exist in the relation? w…

A: 1)  Closure (AE) ={A, E, B, C, D, F, G} Closure (AEI) ={A, E, I, B, C, D, F, G, H, J, K, L} Key for…

Q: Please help with the folllowing: Consider the following declaration of a relation schema…

A: QI:  Insert INTO R (B, C) Values (353, 'B');  Screenshot of SQL program for the above insertion…

Q: :When the primary key is not a composite key, the relation is said to be in at least fifth normal…

A: Lets see the solution.

Q: . The basic operations that can be performed on relations are a. deletion b. insertion c.…

A: There are three basic operations that can change the states of relations in the data-base: Insert,…

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…

Q: ?Which type of relation is an excellent candidate for improvement to second normal form relation…

A: The suitable answer is (a) Relation with an AutoNumber primary key field.

Q: Given the following relation that stores details about students' activities: Activity Golf StudentID…

A: A->B  B is functionally dependent on A if for each distinct value of A we have distinct value in…

Q: Any relation that is not part of the logical model, but is made visible to a user as a a)Absolute…

A: 6.Any relation that is not part of the logical model, but is made visible to a user as a Any such…

Q: . Foreign key is the one in which the ________ of one relation is referenced in another relation. a.…

A: In DBMS, keys are used to uniquely identify data in a table. Multiple keys from different tables can…

Q: NORMALIZATION EXERCISE   Based on the given relation schema below, perform normalization up to…

A: First Normal form conditions:-  Table cell contains single value. Each complete row must be unique.…

Q: If  the functional dependencies are consistent with the above relation,  put TRUE. If they are not,…

A: Rule to check functionally dependent or not .  A-> B             B is functionally dependent on A…

Q: A relation that has no multivalued attributes is in _____ normal form.

A: GIVEN: A relation that has no multivalued attributes is in _____ normal form.

Q: A relation that contains a minimum amount of redundancy and allows users to insert, modify, and…

A: Lets see the solution.

Q: If you assume that a relation has no duplicate data, how do you know there is always at least one…

A: We can always be sure that there is always at least one primary key. Consider the situation when…

Q: Which of the following functional dependencies hold for this relation? (Mark all that apply)

A: First, let us understand what is a Natural Join in SQL. A Natural Join joins two tables with common…

Fundamentals of Datawarehouse

A data warehouse is a data repository which is used to store large quantities of historical data that are mostly used for creating reports that help businesses to identify their weaknesses and strengths. For example, demographics data about people of a region can help businesses identify the needs and preferences of the region’s population. A data warehouse acts as a central storage for storing data that comes from one or more heterogenous sources. It also consists of data which can be old and of historical value. One of the most important applications of this type of system is that it is used for supporting business intelligence and data analytics applications.