Hello, I need help with a database question table 1  deciration_id     type total_income  table 2 Presentation ID, tax code, year, declaration ID table 3 tax code, surname, name, address, city, region Create the queries needed to perform the following tasks.  1) Calculation of the average total income declared for taxpayers in the "Lombardy* region  2) Counting of the declarations made by "Unique" type relating to the year 2003.  3) List, by year of presentation, of the maximum and minimum value of total income declared.

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
icon
Related questions
Question

Hello, I need help with a database question
table 1 
deciration_id
    type
total_income 
table 2
Presentation ID, tax code, year, declaration ID
table 3
tax code, surname, name, address, city, region

Create the queries needed to perform the following tasks.  1) Calculation of the average total income declared for taxpayers in the "Lombardy* region
 2) Counting of the declarations made by "Unique" type relating to the year 2003.
 3) List, by year of presentation, of the maximum and minimum value of total income declared.
 4) Calculation of the year that recorded the lowest total declared income.
 5) List of all taxpayers with the related average income declared, even for taxpayers who
 had not made any statements.

Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps

Blurred answer
Knowledge Booster
Dataset
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Database System Concepts
Database System Concepts
Computer Science
ISBN:
9780078022159
Author:
Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:
McGraw-Hill Education
Starting Out with Python (4th Edition)
Starting Out with Python (4th Edition)
Computer Science
ISBN:
9780134444321
Author:
Tony Gaddis
Publisher:
PEARSON
Digital Fundamentals (11th Edition)
Digital Fundamentals (11th Edition)
Computer Science
ISBN:
9780132737968
Author:
Thomas L. Floyd
Publisher:
PEARSON
C How to Program (8th Edition)
C How to Program (8th Edition)
Computer Science
ISBN:
9780133976892
Author:
Paul J. Deitel, Harvey Deitel
Publisher:
PEARSON
Database Systems: Design, Implementation, & Manag…
Database Systems: Design, Implementation, & Manag…
Computer Science
ISBN:
9781337627900
Author:
Carlos Coronel, Steven Morris
Publisher:
Cengage Learning
Programmable Logic Controllers
Programmable Logic Controllers
Computer Science
ISBN:
9780073373843
Author:
Frank D. Petruzella
Publisher:
McGraw-Hill Education