HackerRank SQL solutions

In this repository, you will find updated SQL solutions for all HackerRank problems as of 2024.
Repo made by HackerRankGPT - Solve HackerRank coding problems during your coding interview, in real-time and undetectable 😎

Category	Problem Name	Link to Problem	Link to Solution	Score
Basic Select	Revising the Select Query I	Problem	solution-revising-select-query-I.sql	10
Basic Select	Revising the Select Query II	Problem	solution-revising-select-query-II.sql	10
Basic Select	Select All	Problem	solution-select-all.sql	10
Basic Select	Select By ID	Problem	solution-select-by-id.sql	10
Basic Select	Japanese Cities' Attributes	Problem	solution-japanese-cities-attributes.sql	10
Basic Select	Japanese Cities' Names	Problem	solution-japanese-cities-names.sql	10
Basic Select	Weather Observation Station 1	Problem	solution-weather-observation-station-1.sql	15
Basic Select	Weather Observation Station 3	Problem	solution-weather-observation-station-3.sql	10
Basic Select	Weather Observation Station 4	Problem	solution-weather-observation-station-4.sql	10
Basic Select	Weather Observation Station 5	Problem	solution-weather-observation-station-5.sql	30
Basic Select	Weather Observation Station 6	Problem	solution-weather-observation-station-6.sql	10
Basic Select	Weather Observation Station 7	Problem	solution-weather-observation-station-7.sql	10
Basic Select	Weather Observation Station 8	Problem	solution-weather-observation-station-8.sql	15
Basic Select	Weather Observation Station 9	Problem	solution-weather-observation-station-9.sql	10
Basic Select	Weather Observation Station 10	Problem	solution-weather-observation-station-10.sql	10
Basic Select	Weather Observation Station 11	Problem	solution-weather-observation-station-11.sql	15
Basic Select	Weather Observation Station 12	Problem	solution-weather-observation-station-12.sql	15
Basic Select	Higher Than 75 Marks	Problem	solution-higher-than-75-marks.sql	15
Basic Select	Employee Names	Problem	solution-employee-names.sql	10
Basic Select	Employee Salaries	Problem	solution-employee-salaries.sql	10
Advanced Select	Type of Triangle	Problem	solution-type-of-triangle.sql	20
Advanced Select	The PADS	Problem	solution-the-pads.sql	30
Advanced Select	Binary Tree Nodes	Problem	solution-binary-tree-nodes.sql	30
Aggregation	Revising Aggregations - The Count Function	Problem	solution-revising-aggregations-the-count-function.sql	10
Aggregation	Revising Aggregations - The Sum Function	Problem	solution-revising-aggregations-the-sum-function.sql	10
Aggregation	Revising Aggregations - Averages	Problem	solution-revising-aggregations-averages.sql	10
Aggregation	Average Population	Problem	solution-average-population.sql	10
Aggregation	Japan Population	Problem	solution-japan-population.sql	10
Aggregation	Population Density Difference	Problem	solution-population-density-difference.sql	10
Aggregation	The Blunder	Problem	solution-the-blunder.sql	15
Aggregation	Top Earners	Problem	solution-top-earners.sql	20
Aggregation	Weather Observation Station 2	Problem	solution-weather-observation-station-2.sql	15
Aggregation	Weather Observation Station 13	Problem	solution-weather-observation-station-13.sql	10
Aggregation	Weather Observation Station 14	Problem	solution-weather-observation-station-14.sql	10
Aggregation	Weather Observation Station 15	Problem	solution-weather-observation-station-15.sql	15
Aggregation	Weather Observation Station 16	Problem	solution-weather-observation-station-16.sql	10
Aggregation	Weather Observation Station 17	Problem	solution-weather-observation-station-17.sql	15
Aggregation	Weather Observation Station 18	Problem	solution-weather-observation-station-18.sql	25
Aggregation	Weather Observation Station 19	Problem	solution-weather-observation-station-19.sql	30
Aggregation	Weather Observation Station 20	Problem	solution-weather-observation-station-20.sql	40
Basic Join	Asian Population	Problem	solution-asian-population.sql	10
Basic Join	African Cities	Problem	solution-african-cities.sql	10
Basic Join	Average Population of Each Continent	Problem	solution-average-population-of-each-continent.sql	10
Basic Join	The Report	Problem	solution-the-report.sql	20

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