# Population Density Difference Solution

Hello Friends in this article i am gone to share Hacker Rank SQL Solutions with you | Population Density Difference Solution

Also Visit:  Japan Population Solution

#### Problem

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

Input Format

The CITY table is described as follows:

## Solution – Population Density Difference

##### MySQL Code
`select max(population) - min(population) from city;`

### Population Density and differences

The Population density is the number of people per unit of area, usually transcribed as “per square kilometer” or square mile, and which may include or exclude, for example, areas of water or glaciers. It is a key geographical term that refers to the number of people living in an area per square kilometre or other unit of land area.

Population distribution refers to the arrangement of the population on a certain area in accordance with conditions and requirements of the society. It is the spreading of people over an area of land. a measurement of population per unit land area.

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