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Add basic select sql problems
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‎README.md

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<div align="center">
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<img src="https://github.com/alexprut/HackerRank/raw/master/hackerrank-logo.png" width="450" height="auto"/>
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[![Solutions](https://img.shields.io/badge/solutions-409-green.svg?style=flat-square)](https://github.com/alexprut/HackerRank#table-of-contents)
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[![Solutions](https://img.shields.io/badge/solutions-423-green.svg?style=flat-square)](https://github.com/alexprut/HackerRank#table-of-contents)
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[![Languages](https://img.shields.io/badge/languages-c%2B%2B%2Cjava%2Chaskell-yellow.svg)](https://github.com/alexprut/HackerRank#table-of-contents)
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[![Author](https://img.shields.io/badge/author-alexprut-brightgreen.svg?style=flat-square)](https://www.hackerrank.com/alexprut)
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[![MIT](https://img.shields.io/dub/l/vibe-d.svg?style=flat-square)](https://github.com/alexprut/HackerRank/blob/master/LICENSE)
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1. [Mathematics](#mathematics)
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1. [Artificial Intelligence](#artificial-intelligence)
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1. [Linux Shell](#linux-shell)
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1. [Sql](#sql)
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## Algorithms
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|Subdomain|Challenge|Difficulty|Score|Solution|
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|Grep Sed Awk|['Sed' command #2](https://www.hackerrank.com/challenges/text-processing-in-linux-the-sed-command-2)|Medium|2|[Solution.txt](Linux%20Shell/Grep%20Sed%20Awk/'Sed'%20command%20#2/Solution.txt)|
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|Grep Sed Awk|['Sed' command #3](https://www.hackerrank.com/challenges/text-processing-in-linux-the-sed-command-3)|Easy|2|[Solution.txt](Linux%20Shell/Grep%20Sed%20Awk/'Sed'%20command%20#3/Solution.txt)|
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## Sql
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|Subdomain|Challenge|Difficulty|Score|Solution|
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|-|-|-|-|-|
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|Basic Select|[Revising the Select Query I](https://www.hackerrank.com/challenges/revising-the-select-query)|Easy|10|[Solution.txt](Sql/Basic%20Select/Revising%20the%20Select%20Query%20I/Solution.txt)|
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|Basic Select|[Revising the Select Query II](https://www.hackerrank.com/challenges/revising-the-select-query-2)|Easy|10|[Solution.txt](Sql/Basic%20Select/Revising%20the%20Select%20Query%20II/Solution.txt)|
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|Basic Select|[Select All](https://www.hackerrank.com/challenges/select-all-sql)|Easy|10|[Solution.txt](Sql/Basic%20Select/Select%20All/Solution.txt)|
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|Basic Select|[Select By ID](https://www.hackerrank.com/challenges/select-by-id)|Easy|10|[Solution.txt](Sql/Basic%20Select/Select%20By%20ID/Solution.txt)|
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|Basic Select|[Japanese Cities' Attributes](https://www.hackerrank.com/challenges/japanese-cities-attributes)|Easy|10|[Solution.txt](Sql/Basic%20Select/Japanese%20Cities'%20Attributes/Solution.txt)|
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|Basic Select|[Japanese Cities' Names](https://www.hackerrank.com/challenges/japanese-cities-name)|Easy|10|[Solution.txt](Sql/Basic%20Select/Japanese%20Cities'%20Names/Solution.txt)|
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|Basic Select|[Weather Observation Station 1](https://www.hackerrank.com/challenges/weather-observation-station-1)|Easy|15|[Solution.txt](Sql/Basic%20Select/Weather%20Observation%20Station%201/Solution.txt)|
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|Basic Select|[Weather Observation Station 3](https://www.hackerrank.com/challenges/weather-observation-station-3)|Easy|10|[Solution.txt](Sql/Basic%20Select/Weather%20Observation%20Station%203/Solution.txt)|
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|Basic Select|[Weather Observation Station 4](https://www.hackerrank.com/challenges/weather-observation-station-4)|Easy|10|[Solution.txt](Sql/Basic%20Select/Weather%20Observation%20Station%204/Solution.txt)|
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|Basic Select|[Weather Observation Station 5](https://www.hackerrank.com/challenges/weather-observation-station-5)|Easy|30|[Solution.txt](Sql/Basic%20Select/Weather%20Observation%20Station%205/Solution.txt)|
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|Basic Select|[Weather Observation Station 6](https://www.hackerrank.com/challenges/weather-observation-station-6)|Easy|10|[Solution.txt](Sql/Basic%20Select/Weather%20Observation%20Station%206/Solution.txt)|
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|Basic Select|[Weather Observation Station 7](https://www.hackerrank.com/challenges/weather-observation-station-7)|Easy|10|[Solution.txt](Sql/Basic%20Select/Weather%20Observation%20Station%207/Solution.txt)|
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|Basic Select|[Weather Observation Station 8](https://www.hackerrank.com/challenges/weather-observation-station-8)|Easy|15|[Solution.txt](Sql/Basic%20Select/Weather%20Observation%20Station%208/Solution.txt)|
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|Basic Select|[Weather Observation Station 9](https://www.hackerrank.com/challenges/weather-observation-station-9)|Easy|10|[Solution.txt](Sql/Basic%20Select/Weather%20Observation%20Station%209/Solution.txt)|
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License
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=======
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Licensed under [MIT](LICENSE).

‎Sql/Japanese Cities' Attributes/Solution.txt

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SELECT * FROM CITY WHERE COUNTRYCODE = "JPN"

‎Sql/Japanese Cities' Names/Solution.txt

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SELECT DISTINCT NAME FROM CITY WHERE COUNTRYCODE = "JPN"

‎Sql/Revising the Select Query I/Solution.txt

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SELECT * FROM CITY WHERE POPULATION > 100000 AND COUNTRYCODE = "USA"

‎Sql/Revising the Select Query II/Solution.txt

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SELECT NAME FROM CITY WHERE POPULATION > 120000 and COUNTRYCODE = "USA" GROUP BY(NAME)

‎Sql/Select All/Solution.txt

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SELECT * FROM CITY

‎Sql/Select By ID/Solution.txt

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SELECT * FROM CITY WHERE ID = 1661

‎Sql/Weather Observation Station 1/Solution.txt

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SELECT CITY, STATE FROM STATION

‎Sql/Weather Observation Station 3/Solution.txt

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SELECT DISTINCT CITY FROM STATION WHERE ID % 2 = 0

‎Sql/Weather Observation Station 4/Solution.txt

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SELECT (COUNT(CITY) - COUNT(DISTINCT CITY)) FROM STATION

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