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MCQ

A relational database developer refers to a record as

a criteria.

a relation.

a tuple.

an attribute.

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MCQ

Which of the following is a fundamental operation in relational algebra?

Set intersection

Natural join

Assignment

None of the mentioned

Discussion

MCQ

The result which operation contains all pairs of tuples from the two relations, regardless of whether their attribute values match.

Join

Cartesian product

Intersection

Set difference

Discussion

MCQ

Which of the following best describes the query?


{t | ? s ? instructor (t[name] = s[name]
? ? u ? department (u[dept name] = s[dept name]
? u[building] =



            
                                                            
                            
                            A
                            
                                Finds the names of all instructors whose department is in the Watson building                            
                        
                                            
                            
                            B
                            
                                Finds the names of all department is in the Watson building                            
                        
                                            
                            
                            C
                            
                                Finds the name of the dapartment whose instructor and building is Watson                            
                        
                                            
                            
                            D
                            
                                Returns the building name of all the departments                            
                        
                                                

            
                Correct Answer: A
                None.



        
            
            
                            
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                4.
                A ________ is a pictorial depiction of the schema of a database that shows the relations in the database, their attributes, and primary keys and foreign keys.
            

            
                                                            
                            
                            A
                            
                                Schema diagram                            
                        
                                            
                            
                            B
                            
                                Relational algebra                            
                        
                                            
                            
                            C
                            
                                Database diagram                            
                        
                                            
                            
                            D
                            
                                Schema flow                            
                        
                                                

            
                Correct Answer: A
                None.
            
        

        
            
            
                            
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                5.
                _____ clause is an additional filter that is applied to the result.
            

            
                                                            
                            
                            A
                            
                                Select                            
                        
                                            
                            
                            B
                            
                                Group-by                            
                        
                                            
                            
                            C
                            
                                Having                            
                        
                                            
                            
                            D
                            
                                Order by                            
                        
                                                

            
                Correct Answer: C
                None.
            
        

        
            
            
                            
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More Database Management System Topics

Miscellaneous or General

Relational Algebra

Database Systems

Data Models

The Relational Database Model

Entity Relationship (ER) Modeling

Advanced Data Modeling

Normalization

Structured Query Language (SQL)

Advanced SQL

Database Design

Transaction and Concurrency

Data Warehouses

Database Administration

Mixed

Banking

Engineering

General

Medical

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category More Database Management System Topics

Miscellaneous or General

Relational Algebra

Database Systems

Data Models

The Relational Database Model

Entity Relationship (ER) Modeling

Advanced Data Modeling

Normalization

Structured Query Language (SQL)

Advanced SQL

Database Design

Transaction and Concurrency

Data Warehouses

Database Administration

Mixed

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Community Discussion

Similar Questions

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Report Error

Report Error

Report Error

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More Database Management System Topics