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1. Solve the following relational expressions for above relations. a. PName(RAge 25(User)) b. Rid>20Age!=31(User) c. Ruser.Occupationld=DOccupation.Occupationld(User X Occupation)

1. Solve the following relational expressions for above relations. a. PName(RAge 25(User)) b. Rid>20Age!=31(User) c. Ruser.Occupationld=DOccupation.Occupationld(User X Occupation)

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Relational Algebra Practice Questions User Id Name Age Gender Occupationld Cityld John 25 Male 1 3 2 Sara 20 Female 3 4 3 Victor 31 Male 2 5 4 Jane 27 Female 3 Occupationld OccupationName Cityld CityName 1 Software Engineer 1 Halifax Accountant 2 Calgary 3 Pharmacist Boston 4. Library Assistant 4 New York 5 Toronto Occupation City 1. Solve the following relational expressions for above relations. a. PName(RAge>25(User)) b. Rid>20Age!=31(User) c. Ruser.Occupationld=Occupation.Occupationld(User X Occupation) d. User I Occupation ICity e. PName, Gender(RCityName="Boston"(User City)) Consider the following schema: Suppliers (sid : integer, sname : string, address : string) Parts (pid : integer, pname : string, color : string) Catalog (sid : integer, pid : integer, cost : real) The key fields are underlined and domain of each field is listed after the name f. Find name of suppliers g. Find all parts whose id is greater then 45 h. Show list of addresses of supliers.
Transcribed Image Text:Relational Algebra Practice Questions User Id Name Age Gender Occupationld Cityld John 25 Male 1 3 2 Sara 20 Female 3 4 3 Victor 31 Male 2 5 4 Jane 27 Female 3 Occupationld OccupationName Cityld CityName 1 Software Engineer 1 Halifax Accountant 2 Calgary 3 Pharmacist Boston 4. Library Assistant 4 New York 5 Toronto Occupation City 1. Solve the following relational expressions for above relations. a. PName(RAge>25(User)) b. Rid>20Age!=31(User) c. Ruser.Occupationld=Occupation.Occupationld(User X Occupation) d. User I Occupation ICity e. PName, Gender(RCityName="Boston"(User City)) Consider the following schema: Suppliers (sid : integer, sname : string, address : string) Parts (pid : integer, pname : string, color : string) Catalog (sid : integer, pid : integer, cost : real) The key fields are underlined and domain of each field is listed after the name f. Find name of suppliers g. Find all parts whose id is greater then 45 h. Show list of addresses of supliers.
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