Weather Observation Station 19 in SQL | HackerRank Programming Solutions | HackerRank SQL Solutions

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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 – Weather Observation Station 19 sql – Hacker Rank Solution

Weather Observation Station 19 sql – Hacker Rank Solution

Problem:

Consider  and  to be two points on a 2D plane where  are the respective minimum and maximum values of Northern Latitude (LAT_N) and  are the respective minimum and maximum values of Western Longitude (LONG_W) in STATION.

Query the Euclidean Distance between points  and  and format your answer to display  decimal digits.

Input Format

The STATION table is described as follows:

where LAT_N is the northern latitude and LONG_W is the western longitude.

Weather Observation Station 19 sql – Hacker Rank Solution

SELECT ROUND(SQRT(POW(MIN(LAT_N)-MAX(LAT_N), 2) + 
                  POW(MIN(LONG_W)-MAX(LONG_W), 2)), 4) FROM STATION;