Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

could you please help me figure the question out and give explaniation for each answer? Thanks! 2. Queries. Consider the following schema for a relational

could you please help me figure the question out and give explaniation for each answer? Thanks!

image text in transcribed

2. Queries. Consider the following schema for a relational database. The schema models which Uber drivers drive which passengers to which destination at what time DRIVER-[did, dname, rating, car.type with key {did) - PASSENGER-[pno, pname, email) with key {pno) TRIP did, pno, time, dest with key [did, time] and foreign keys [didCDRIVER[did [pno)CPASSENGER[pno] (a) Write down an English language description for the following domain relational 6 marks] calculus query (Frating) rdid-Zgname (DRIVER(zdid-Zgname, Zrating. Subaru) ? Vapno, atime (TRIP (rdid , Xpno, Xtime. Lah-Lah-Land) (b) Write down the following query in SQL: What is the email of passengers that where 6 marks] driven by Darth Vader to Timbaktu in a Tuk-tuk? (c) Write down the following query in relational algebra: What are the names of drivers 6 marks who have driven more than one passenger to the same destination? (d) Write down the following query in 7 marks 7 marks 7 marks What are the names of passengers who were driven to Spookers by everyone who - relational algebra, and - safe domain relational calculus, and SQL drives a car of t ype Trabant

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image_2

Step: 3

blur-text-image_3

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Formal SQL Tuning For Oracle Databases Practical Efficiency Efficient Practice

Authors: Leonid Nossov ,Hanno Ernst ,Victor Chupis

1st Edition

3662570564, 978-3662570562

More Books

Students also viewed these Databases questions

Question

Define the term Working Capital Gap.

Answered: 1 week ago

Question

13. You always should try to make a good first impression.

Answered: 1 week ago