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Three relational schemas are given below. • Patient (patientID, name, address, age) Doctor (doctorID, name, specialty, yearsExperience) Diagnosis (diagnosisID. patientID, doctorID, diagnosisName, prescription) NOTE: Express each of the provided information needs as a relational algebra query using only projection (r), selection (a), renaming (p), inner joins (0), set union/intersection (U, n), and division You may write your queries using either the symbol (i.e. n) using the 'Insert Math Equation' option or the operations' word terminology (i.e. projection). (1) Find the ID's of patients who have been diagnosed by a doctor with more than 15 years and less than 10 years experience. (2) Find the prescriptions given by doctors with a "cardiologist" specialty.

Three relational schemas are given below. • Patient (patientID, name, address, age) Doctor (doctorID, name, specialty, yearsExperience) Diagnosis (diagnosisID. patientID, doctorID, diagnosisName, prescription) NOTE: Express each of the provided information needs as a relational algebra query using only projection (r), selection (a), renaming (p), inner joins (0), set union/intersection (U, n), and division You may write your queries using either the symbol (i.e. n) using the 'Insert Math Equation' option or the operations' word terminology (i.e. projection). (1) Find the ID's of patients who have been diagnosed by a doctor with more than 15 years and less than 10 years experience. (2) Find the prescriptions given by doctors with a "cardiologist" specialty.

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Three relational schemas are given below. Patient (patientID, name, address, age) Doctor (doctorID, name, specialty, yearsExperience) Diagnosis (diagnosisID. patientID, doctorlD, diagnosisName, prescription) NOTE: Express each of the provided information needs as a relational algebra query using only projection (n), selection (a), renaming (p), inner joins (), set union/intersection (U, n), and division (). You may write your queries using either the symbol (i.e. n) using the 'Insert Math Equation' option or the operations' word terminology (i.e. projection). (1) Find the ID's of patients who have been diagnosed by a doctor with more than 15 years and less than 10 years experience. (2) Find the prescriptions given by doctors with a "cardiologist" specialty.
Transcribed Image Text:Three relational schemas are given below. Patient (patientID, name, address, age) Doctor (doctorID, name, specialty, yearsExperience) Diagnosis (diagnosisID. patientID, doctorlD, diagnosisName, prescription) NOTE: Express each of the provided information needs as a relational algebra query using only projection (n), selection (a), renaming (p), inner joins (), set union/intersection (U, n), and division (). You may write your queries using either the symbol (i.e. n) using the 'Insert Math Equation' option or the operations' word terminology (i.e. projection). (1) Find the ID's of patients who have been diagnosed by a doctor with more than 15 years and less than 10 years experience. (2) Find the prescriptions given by doctors with a "cardiologist" specialty.
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