The trigger below is defined on the relation T (C, D) with the primary key on the attr

Q: rence relation is defined as 1

A: Given:Solved using divide and conquer approach    nr=n-1r-1+n-1r Function  Xn,r  if  (r=0  or n=r)…

Q: Consider the following relations: Relation A: T1 T2 55 NULL

A: Dear Student, First SELECT B.T3 FROM B , will first select all the tuples from column T3 then SELECT…

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: 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: List all possible candidate keys for the above relation :

A: Given:   List all possible candidate keys for the given relation :

Q: What are three criteria that indicate that a surrogate key for a relation's main key should be…

A: Given: What are three criteria that indicate that a surrogate key for a relation's main key should…

Q: What are three criteria that indicate that a surrogate key for a relation's main key should be…

A: Surrogate key: It is a key that does not have any contextual meaning but is used to identify the…

Q: A relation that has no transitive dependencies is in __________ normal form.

A: Normalization  in DMBS :  In designing the database, there is a requirement to remove all the types…

Q: The degree is the number of tuples in a relation. Select one: a. False b. True

A: Relational Database: Table is called as relation or file. Row is called as tuple. Column is called…

Q: |A--→ BC, C---→D for relation R? es, why? If no, please nd Dependence Prese

A: For finding the key of relation R, Step 1 - Search the attributes which are not in right hand side…

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

A:

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: Compute the closure of the following set F of functional dependencies for relationschema R = (A, B,…

A: RDBMS is a Relational database management system is used especially for relational databases,…

Q: The number of tuples in a relation is referred to as

A: We are given a question related to DBMS and we have to complete the given statement. The question is…

Q: Under what circumstances can an attribute of a relation be of variable length?

A: The condition is given below:

Q: Under what circumstances can an attribute of a relation be of variable length?

A: An attribute of a relation is the characteristic which is specified in a column. A relation is a…

Q: What is a well-structured relation?

A: Answer: Well-structured relation Definition: A well-structured relation is defined as the…

Q: Given the relation R(A, B, C, D, E, F), the following functional dependencies exist: B --> C, D D…

A: Given : R(A, B, C, D, E, F) B --> C, DD --> F

Q: Define the term Well-structured relation?

A: Well-structured relation • A well-structured relation is defined as the phenomenon where the…

Q: What are the conditions under which an attribute of a relation may have a changeable length?

A: Introduction: An attribute is defined as a trait or characteristic found in a person, a place, or an…

Q: What are the conditions under which an attribute of a relation may have a changeable length?

A: Introduction: A relation may be considered as a subset of the Cartesian product of the list of…

Q: The decomposition of one relation say R into two relations is classified as a. functional…

A: c) binary decomposition

Q: B --> C, D D --> F a)  What normal form is the relation R in? b)  Normalize relation R to 3NF.…

A: a) The relation R(A,B,C,D,E,F) is in 1NFExplanation:Given relational schema isR(A,B,C,D,E,F)The…

Q: Suppose that you are given a relation R = (A,B,C,D,E) with the following functional dependencies:…

A: Here, from the given functional dependency we have, {BC}+ = ADEBC {D}+ = BD   Hence here {BC} is the…

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: The type of algorithm in which decomposition of relation schema is constructed from other specific…

A: Certain algorithms are used to create relational decomposition from a set of relationships in…

Q: In a relation R(A,, A2, A3,A4) if A, is candidate key then find the number of possible super keys.

A: Given: A relation having 4 attributes A1, A2, A3,A4. A1 is the candidate key. To Find: Number of…

Q: A relation that has no partial functional dependencies is in ___________ normal form.

A: Given:   A relation that has no partial functional dependencies is in ___________ normal form.…

Q: Write a SQL statement (Le. SQL DDL) to convert both 'Create' and 'BookCopy' to a relation.

A: The given problem is related to SQL and the requirement is to create the table for BookCopy and…

Q: Select the best answer regarding the FK value, if it is part of a PK Select one: a. Can not be null…

A: OPTION (B) Must match a value in the PK in the home relation

Q: Consider the relations Student(name, Marks) and Teacher(ID, name, Salary) in which name is the…

A: According to natural join, if more than one attribute is in common then natural join selects only…

Q: Multivalued dependencies are avoided in relation schema when the relation schema conforms to – (a)…

A: Answer: Multivalued dependencies are avoided in relation schema when the relation conforms to 4NF.…

Q: Consider the relations Student(name, Marks) and Teacher(ID, name, Salary) in which name is the…

A: Natural join joins two table based on common attribute.

Q: ases: Give six important properties of relations.

A: Required: Databases: Give six important properties of relations.

Q: An attributes in a relation coming from another relation is called: * O foreign key fields…

A: An attributes in relation coming from another relation is called

Q: 151002240 Database Arelation with two attributes A and B satisfies the functional dependency A B…

A: Answer is False

Q: Consider the following functional dependencies for a relation R(A, B, C, D) A -> (B, C, D), (A, D)…

A: Given relation with functional dependencies is: R(A, B, C, D) A -> (B, C, D), (A, D) -> (B, C)…

Q: Consider the following parameters of a relation r (A, B, C) in which A be the primary key. nr =…

A: Answer: I have given answered in the handwritten format

Q: Design a variant of the hybrid merge-join algorithm for the case where both relations are not…

A: Hybrid merge join algorithm:  It is a variation on merge join operation, which is performed on…

Q: Design a variant of the hybrid merge-join algorithm for the case where both relations are not…

A: Hybrid merge join algorithm:  It is a variation on merge join operation, which is performed on…

Q: Indicate dependences and their type.

A: There are two data dependencies: on $6 between the SW and the add, and on $1 between the SWand lw.

Q: Convert any E-R diagram in a Relation.

A:

Q: What is the highest normal form for the following relation and its functional dependencies? Assume…

A: A(x , w ,z) x->w functional dependency  is a relationship between two attributes, typically…

Q: A Relation is a Subset of a Cartesian product of a list of domains  explain

A: 1. Relation A relation is also referred to as a Relation_State, is a collection of different tuple…

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

A: Rules of 2NF: Table must be in 1NF No non-prime attribute is dependent on the proper subset of any…

Q: Give an example of a relation with a unique composite key

A: A unique key is one that identifies a row in a relation uniquely. The unique key may be combination…

Q: Write a relation algebra based on the following algebra: Book (BookID, Price, Year, Author,…

A: Relation algebra uses operators to perform the query. It provides the theoretical foundation for…

Q: RI E2 E1 R4 R2 R5 E4 R3 E3 hat is the minimum number of relations required for the above E-R…

A: According to the question: Given, An ER diagram. We have to calculate the minimum number of relation…

Q: SIf a decomposition of a relation R into R¡ and R2 is lossless, then which of the followings are…

A: If a decomposition of a relation “R” into “R1”, and “R2” is lossless then it produces “R” by…