Population Density Difference in SQL | HackerRank Programming Solutions | HackerRank SQL Solutions

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In this post, you will find the solution for Population Density Difference in SQL-HackerRank Problem. We are providing the correct and tested solutions of coding problems present on HackerRank. If you are not able to solve any problem, then you can take help from our Blog/website.

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Introduction To SQL

SQL stands for Structured Query Language. SQL is used to create, remove, alter the database and database objects in a database management system and to store, retrieve, update the data in a database. SQL is a standard language for creating, accessing, manipulating database management system. SQL works for all modern relational database management systems, like SQL Server, Oracle, MySQL, etc.

  • It is a standard language for Relational Database System. It enables a user to create, read, update and delete relational databases and tables.
  • All the RDBMS like MySQL, Informix, Oracle, MS Access and SQL Server use SQL as their standard database language.
  • SQL allows users to query the database in a number of ways, using English-like statements.

Link for the ProblemPopulation Density Difference SQl- Hacker Rank Solution

Population Density Difference SQl- Hacker Rank Solution

Problem:

Query the difference between the maximum and minimum populations in CITY.

Input Format

The CITY table is described as follows: 

1449729804 f21d187d0f CITY
Population Density Difference SQl- Hacker Rank Solution
select max(Population)-min(Population) from City;

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