Suppose user A, who has all authorization privileges on a relation r, grants select on relation r to public with grant option. Suppose user B then grants select on r to A. Does this cause a cycle in the authorization graph? Explain why.

Q: Make a hybrid merge-join variant that works in scenarios where neither relation is physically sorted…

A: Introduction: Merge join and hybrid merge join are different. Before utilising merge join, we sorted…

Q: PrimeVideo is a startup company providing concierge DVD kiosk service in upscale neighborhoods.…

A: Given : PrimeVideo is a startup company providing concierge DVD kiosk service in upscale…

Q: Consider the relation Project(pid,name,budget) with relation instances {(100,'GOTAM',30000),…

A: We need to find the degree of the given relation.

Q: It is feasible to design a link such as sec course from a collection of many-to-one connections.…

A: INTRODUCTION: Each table must have a primary key to guarantee the entities' integrity. Null values…

Q: How do we calculate a functional dependence closure?  Which of the following give a good example of…

A: List all the funtional dependency present in the relation. Find the unidentified functional…

Q: ;; "relate" accepts a positive integer x and relation R and returns { y | (x y) €R }. ;; Type…

A: Helper Function : An helper function is a capacity that performs part of the calculation of another…

Q: Suppose relation R (x, y, z, w) has no tuples. Consider the trigger: CREATE TRIGGER T AFTER INSERT…

A: Answer to the above question is in step2.

Q: Let A = {1,5,8,9). Are the following relations on A reflexive? 1. {(9,8), (8, 1), (1, 5), (9, 9),…

A: Answer the above question are as follows

Q: database relation R into relations R₁ and R₂, we want R₂ MR₂R so that no tuples in R is lost. This…

A: In other words, lossless decomposition is a way of normalizing a database by breaking down a large…

Q: Suppose user AA, who has all authorizations on a relation rr, grants select on relation rr to public…

A: No, granting select on relation rr to public with grant option by user AA and then granting select…

Q: It is feasible to design a link such as sec course from a collection of many-to-one connections.…

A: Yes, it is possible to design a database schema with a many-to-one relationship between two…

Q: Consider a relation R with six attributes A, B, C, D, E, F. You are given the following…

A: In the context of databases, a relation refers to a table or a set of tables within a relational…

Q: A link like the second course can be built from a collection of many-to-one relationships. Do the…

A: Consider a connection: That results from a many-to-one relationship with limitations on the primary…

Q: Create a new iteration of the hybrid merge-join method, in which none of the relationships are…

A: The hybrid merge-join method is an progressive procedure for execution database joins. Old-style…

Q: Consider F = {BC -> D, B -> E, CE -> D, E -> CA, BF -> G} and R(A,B,C,D,E,F,G) 5. Find a 3NF…

A: The given Functional depenency are :  F = {BC -> D, B -> E, CE -> D, E -> CA, BF ->…

Q: A link like the second course can be built from a collection of many-to-one relationships. Do the…

A: Consider a connection: That results from a many-to-one relationship with limitations on the primary…

Q: Consider the relation Project(pid,name,budget) with relation instances {(100,'GOTAM',30000),…

A: The cardinality of the above relation is 4  Cardinality is just number of tuples in a relation.

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: Same-attribute primary and candidate keys are feasible.

A: The statement suggests the feasibility of having primary keys and candidate keys with the same…

Q: Make a version of the hybrid merge-join method that works when both relations are not physically…

A: The hybrid merge-join method can be modified to work with relations that are not physically sorted…

Q: Use the chase test to tell whether each of the following dependencies hold in a relation R(A, B, C,…

A: The Chase Test is an algorithmic procedure used to test whether a set of functional dependencies…

Q: Consider the recursive query in Figure 5.16 that outputs this transitive closure. Write a that finds…

A: Recursion: Recursive views make it possible to write queries , such as transitive closure queries,…

Q: Consider the department relation's foreign-key restriction from the instructor's dept name property.…

A: Infringement of the foreign key constraint: When the primary key of a table that is used as a…

Q: Make a hybrid merge-join variant that works in scenarios where neither relation is physically sorted…

A: The merge join and the hybrid merge join are not the same. We learned from the merge join method…

Q: Many one-to-many connections may be pieced together to form a connection like the second track. Do…

A: primary key constraint in a relational database acts as a unique identifier for each row in a table.

Q: There are three tables in this database (see image). Write MYSQL code for: (1) Create a trigger…

A: (1) MYSQL code for creating trigger “insert_inventory” on table “Inventory”:…

Intermediate SQL Concepts

A query is a request for data or information from one or more database tables. This information could be presented in the form of pictorials, graphs, or complicated findings which helps in easy interpretation. Structured Query Language (SQL) is the most widely used programming language for retrieving and organizing data from relational databases. Collection of tables with rows and columns is referred to as a database. SQL is the language of databases. It makes it easier to extract specific data from databases, which can then be used for analysis.