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In this post, you will find the solution for Average Population 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 Problem – Average Population – Hacker Rank Solution
Average Population – Hacker Rank Solution
Problem:
Query the average population for all cities in CITY, rounded down to the nearest integer.
Input Format
The CITY table is described as follows:
Average Population – Hacker Rank Solution
SELECT
COUNT(CITY) - COUNT(DISTINCT CITY)
FROM
STATION;
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