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MCQ

An expression in the domain relational calculus is of the form

{P(x1, x2, . . . , xn) | < x1, x2, . . . , xn > }

{x1, x2, . . . , xn | < x1, x2, . . . , xn > }

{ x1, x2, . . . , xn | x1, x2, . . . , xn}

{< x1, x2, . . . , xn > | P(x1, x2, . . . , xn)}

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Which of the following best describes the query?


{t | ? s ? instructor (t[name] = s[name]
? ? u ? department (u[dept name] = s[dept name]
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                            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                            
                        
                                            
                            
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                            D
                            
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                Correct Answer: A
                None.



        
            
            
                            
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Relational Algebra

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Normalization

Structured Query Language (SQL)

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Transaction and Concurrency

Data Warehouses

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Medical

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Miscellaneous or General

Relational Algebra

Database Systems

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The Relational Database Model

Entity Relationship (ER) Modeling

Advanced Data Modeling

Normalization

Structured Query Language (SQL)

Advanced SQL

Database Design

Transaction and Concurrency

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