{"id":25828875,"url":"https://github.com/tawfikhammad/sql-problems-hackerrank","last_synced_at":"2025-06-11T18:05:22.989Z","repository":{"id":222149129,"uuid":"756402365","full_name":"tawfikhammad/SQL-Problems-Hackerrank","owner":"tawfikhammad","description":"The solutions of SQL hackerrank problems 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SQL Problems of Hackerrank\nThe solutions of SQL hackerrank problems \n\n\n![GitHub](https://img.shields.io/github/license/tawfikhammad/SQL_Problems-Hackerrank?style=flat)\n![ViewCount](https://views.whatilearened.today/views/github/tawfikhammad/SQL_Problems-Hackerrank.svg?cache=remove)\n\n---\n\n#### *If you find this repository helpful, consider giving it a star!*\n\n## License\nThis repository is licensed under MIT License - see [License](LICENSE) for more details\n\n## EASY \n\n| Title |\n| :---: | \n| [Draw The Triangle 1](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Alternative%20Queries/Draw%20The%20Triangle%201) | \n| [Draw The Triangle 2](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Alternative%20Queries/Draw%20The%20Triangle%202) | \n| [Revising the Select Query I](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Select/Revising%20the%20Select%20Query%20I) | \n| [Revising the Select Query II](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Select/Revising%20the%20Select%20Query%20II)  | \n| [Select All](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Select/Select%20All)  | \n| [Select by ID](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Select/Select%20by%20ID) | \n| [Japanese Cities' Detail](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Select/Japanese%20Cities'%20Detail)  | \n| [Japanese Cities' Name](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Select/Japanese%20Cities'%20Name)  | \n| [Weather Observation Station 1](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Select/Weather%20Observation%20Station%201)  |\n| [Weather Observation Station 3](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Select/Weather%20Observation%20Station%203)  | \n| [Weather Observation Station 4](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Select/Weather%20Observation%20Station%204)  |\n| [Weather Observation Station 5](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Select/Weather%20Observation%20Station%205) |\n| [Weather Observation Station 6](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Select/Weather%20Observation%20Station%206)  |\n| [Weather Observation Station 7](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Select/Weather%20Observation%20Station%207)  | \n| [Weather Observation Station 8](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Select/Weather%20Observation%20Station%208)  |\n| [Weather Observation Station 9](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Select/Weather%20Observation%20Station%209)  |\n| [Weather Observation Station 10](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Select/Weather%20Observation%20Station%2010)  | \n| [Weather Observation Station 11](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Select/Weather%20Observation%20Station%2011)  |\n| [Weather Observation Station 12](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Select/Weather%20Observation%20Station%2012)  | \n| [Higher Than 75 marks](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Select/Higher%20Than%2075%20marks)| \n| [Employee Names](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Select/Employee%20Names) | \n| [Employee Salaries](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Select/Employee%20Salaries) | \n| [Type of Triangle](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Advanced%20Selection/Type%20of%20Triangle) | \n| [Revising Aggregations - The Count Function](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Aggregation/Revising%20Aggregations%20-%20The%20Count%20Function) | \n| [Revising Aggregations - The sum Function](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Aggregation/Revising%20Aggregations%20-%20The%20sum%20Function) | \n| [Revising Aggregations - Averages](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Aggregation/Revising%20Aggregations%20-%20Averages) | \n| [Average Population](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Aggregation/Average%20Population) |\n| [Japan Population](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Aggregation/Japan%20Population) |\n| [Population Density Difference](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Aggregation/Population%20Density%20Difference) |\n| [The Blunder](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Aggregation/The%20Blunder) |\n| [Top Earners](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Aggregation/Top%20Earners) |\n| [Weather Observation Station 2](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Aggregation/Weather%20Observation%20Station%202)  |\n| [Weather Observation Station 13](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Aggregation/Weather%20Observation%20Station%2013)  |\n| [Weather Observation Station 14](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Aggregation/Weather%20Observation%20Station%2014)  |\n| [Weather Observation Station 15](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Aggregation/Weather%20Observation%20Station%2015)  |\n| [Weather Observation Station 16](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Aggregation/Weather%20Observation%20Station%2016)  |\n| [Weather Observation Station 17](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Aggregation/Weather%20Observation%20Station%2017)  |\n| [Population Census](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Join/Population%20Census) |\n| [African Cities](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Join/African%20Cities) |\n| [Average Population of Each Continent](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Join/Average%20Population%20of%20Each%20Continent) |\n\n-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------\n\n## MEDIUM \n\n| Title |\n| :---: | \n| [The PADS](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Advanced%20Selection/The%20PADS) | \n| [Occupations](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Advanced%20Selection/Occupations) | \n| [Binary Tree Nodes](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Advanced%20Selection/Binary%20Tree%20Nodes) | \n| [New Companies](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Advanced%20Selection/New%20Companies)  | \n| [Weather Observation Station 18](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Aggregation/Weather%20Observation%20Station%2018)  | \n| [Weather Observation Station 19](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Aggregation/Weather%20Observation%20Station%2019)  | \n| [Weather Observation Station 20](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Aggregation/Weather%20Observation%20Station%2020)  | \n| [The Report](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Join/The%20Report)  | \n| [Top Competitors](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Join/Top%20Competitors)  |\n| [Ollivander's Inventory](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Join/Ollivander's%20Inventory)  | \n| [Challenges](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Join/Challenges)  |\n| [Contest Leaderboard](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Basic%20Join/Contest%20Leaderboard) |\n| [Placements](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Advanced%20Join/Placements)  |\n| [SQL Project Planning](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Advanced%20Join/SQL%20Project%20Planning)  | \n| [Symmetric Pairs](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Advanced%20Join/Symmetric%20Pairs)  |\n| [Print Prime Numbers](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Alternative%20Queries/Print%20Prime%20Numbers)  |\n\n-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------\n\n## HARD \n\n| Title |\n| :---: | \n| [15 Days of Learning SQL](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Advanced%20Join/15%20Days%20of%20Learning%20SQL) | \n| [Interviews](https://github.com/tawfikhammad/SQL-Problems-Hackerrank/tree/main/Advanced%20Join/Interviews) | \n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Ftawfikhammad%2Fsql-problems-hackerrank","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Ftawfikhammad%2Fsql-problems-hackerrank","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Ftawfikhammad%2Fsql-problems-hackerrank/lists"}