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Consider a relational database with the following schema: PERSONS (NAME, DATE-OF-BIRTH, CITY-OF-BIRTH) PLAYS (PERSON-NAME, SPORT) Foreign key: PLAYS (PERSON-NAME) REFRERENCES PERSONS (NAME) For each of the query in the left column below, select the relational algebra from the right column that is the correct answer for it. (5 points each) a. Find the names of the sports that are played by everyone. f. Find the sports that are played by at least one person. g. ✓ Find the name and date of birth of each person who plays the sports tennis. i. Find the name of the person who doesn't play any sports. a. PLAYS/T NAME (PERSONS) b.π NAME, DATE-OF-BIRTH (PLAYS SPORT='tennis' PERSONS) C. IT SPORT (PLAYS NAME=PERSON-NAME PERSONS) d. πT NAME (PERSONS) e. πT NAME (PERSONS)/PLAYS f. I SPORT (PLAYS) g. π NAME, DATE-OF-BIRTH (PLAYS∞ NAME=PERSON-NAME AND SPORT='tennis' PERSONS) h.π PERSON-NAME (PLAYS)-IT NAME (PERSONS) i. π NAME (PERSONS)-TI PERSON-NAME (PLAYS)

Consider a relational database with the following schema: PERSONS (NAME, DATE-OF-BIRTH, CITY-OF-BIRTH) PLAYS (PERSON-NAME, SPORT) Foreign key: PLAYS (PERSON-NAME) REFRERENCES PERSONS (NAME) For each of the query in the left column below, select the relational algebra from the right column that is the correct answer for it. (5 points each) a. Find the names of the sports that are played by everyone. f. Find the sports that are played by at least one person. g. ✓ Find the name and date of birth of each person who plays the sports tennis. i. Find the name of the person who doesn't play any sports. a. PLAYS/T NAME (PERSONS) b.π NAME, DATE-OF-BIRTH (PLAYS SPORT='tennis' PERSONS) C. IT SPORT (PLAYS NAME=PERSON-NAME PERSONS) d. πT NAME (PERSONS) e. πT NAME (PERSONS)/PLAYS f. I SPORT (PLAYS) g. π NAME, DATE-OF-BIRTH (PLAYS∞ NAME=PERSON-NAME AND SPORT='tennis' PERSONS) h.π PERSON-NAME (PLAYS)-IT NAME (PERSONS) i. π NAME (PERSONS)-TI PERSON-NAME (PLAYS)

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Consider a relational database with the following schema: PERSONS (NAME, DATE-OF-BIRTH, CITY-OF-BIRTH) PLAYS (PERSON-NAME, SPORT) Foreign key: PLAYS (PERSON-NAME) REFRERENCES PERSONS (NAME) For each of the query in the left column below, select the relational algebra from the right column that is the correct answer for it. (5 points each) a. Find the names of the sports that are played by everyone. f. Find the sports that are played by at least one person. g. ✓ Find the name and date of birth of each person who plays the sports tennis. i. Find the name of the person who doesn't play any sports. a. PLAYS/T NAME (PERSONS) b.π NAME, DATE-OF-BIRTH (PLAYS SPORT='tennis' PERSONS) C. IT SPORT (PLAYS NAME=PERSON-NAME PERSONS) d. πT NAME (PERSONS) e. πT NAME (PERSONS)/PLAYS f. I SPORT (PLAYS) g. π NAME, DATE-OF-BIRTH (PLAYS∞ NAME=PERSON-NAME AND SPORT='tennis' PERSONS) h.π PERSON-NAME (PLAYS)-IT NAME (PERSONS) i. π NAME (PERSONS)-TI PERSON-NAME (PLAYS)
Transcribed Image Text:Consider a relational database with the following schema: PERSONS (NAME, DATE-OF-BIRTH, CITY-OF-BIRTH) PLAYS (PERSON-NAME, SPORT) Foreign key: PLAYS (PERSON-NAME) REFRERENCES PERSONS (NAME) For each of the query in the left column below, select the relational algebra from the right column that is the correct answer for it. (5 points each) a. Find the names of the sports that are played by everyone. f. Find the sports that are played by at least one person. g. ✓ Find the name and date of birth of each person who plays the sports tennis. i. Find the name of the person who doesn't play any sports. a. PLAYS/T NAME (PERSONS) b.π NAME, DATE-OF-BIRTH (PLAYS SPORT='tennis' PERSONS) C. IT SPORT (PLAYS NAME=PERSON-NAME PERSONS) d. πT NAME (PERSONS) e. πT NAME (PERSONS)/PLAYS f. I SPORT (PLAYS) g. π NAME, DATE-OF-BIRTH (PLAYS∞ NAME=PERSON-NAME AND SPORT='tennis' PERSONS) h.π PERSON-NAME (PLAYS)-IT NAME (PERSONS) i. π NAME (PERSONS)-TI PERSON-NAME (PLAYS)
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