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Annotated solutions to HackerRank's SQL domain questions. https://www.hackerrank.com/domains/sql?badge_type=sql

Mostly written in MySQL unless otherwise stated.

Name		Name	Last commit message	Last commit date
Latest commit History 3 Commits
15_Days_Of_Sql.sql		15_Days_Of_Sql.sql
African_Cities.sql		African_Cities.sql
Asian_Population.sql		Asian_Population.sql
Average_Population.sql		Average_Population.sql
Average_Population_of_Each_Continent.sql		Average_Population_of_Each_Continent.sql
Binary_Tree_Nodes.sql		Binary_Tree_Nodes.sql
Challenges.sql		Challenges.sql
Contest_Leaderboard.sql		Contest_Leaderboard.sql
Draw_The_Triangle_1.sql		Draw_The_Triangle_1.sql
Draw_The_Triangle_2.sql		Draw_The_Triangle_2.sql
Employee_Names.sql		Employee_Names.sql
Employee_Salaries.sql		Employee_Salaries.sql
Higher_Than_75_Marks.sql		Higher_Than_75_Marks.sql
Interviews.sql		Interviews.sql
Japan_Population.sql		Japan_Population.sql
Japanese_Cities_Attributes.sql		Japanese_Cities_Attributes.sql
Japanese_Cities_Names.sql		Japanese_Cities_Names.sql
New_Companies.sql		New_Companies.sql
Occupations.sql		Occupations.sql
Ollivanders_Inventory.sql		Ollivanders_Inventory.sql
Placements.sql		Placements.sql
Population_Density_Difference.sql		Population_Density_Difference.sql
Print_Prime_Numbers.sql		Print_Prime_Numbers.sql
Projects.sql		Projects.sql
README.md		README.md
Revising_Aggregations-Averages.sql		Revising_Aggregations-Averages.sql
Revising_Aggregations-The_Count_Function.sql		Revising_Aggregations-The_Count_Function.sql
Revising_Aggregations-The_Sum_Function.sql		Revising_Aggregations-The_Sum_Function.sql
Revising_The_Select_Query_1.sql		Revising_The_Select_Query_1.sql
Revising_The_Select_Query_2.sql		Revising_The_Select_Query_2.sql
Select_All.sql		Select_All.sql
Select_By_ID.sql		Select_By_ID.sql
Symmetric_Pairs.sql		Symmetric_Pairs.sql
The_Blunder.sql		The_Blunder.sql
The_PADS.sql		The_PADS.sql
The_Report.sql		The_Report.sql
Top_Competitors.sql		Top_Competitors.sql
Top_Earners.sql		Top_Earners.sql
Type_Of_Triangle.sql		Type_Of_Triangle.sql
Weather_Observation_Station_1.sql		Weather_Observation_Station_1.sql
Weather_Observation_Station_10.sql		Weather_Observation_Station_10.sql
Weather_Observation_Station_11.sql		Weather_Observation_Station_11.sql
Weather_Observation_Station_12.sql		Weather_Observation_Station_12.sql
Weather_Observation_Station_13.sql		Weather_Observation_Station_13.sql
Weather_Observation_Station_14.sql		Weather_Observation_Station_14.sql
Weather_Observation_Station_15.sql		Weather_Observation_Station_15.sql
Weather_Observation_Station_16.sql		Weather_Observation_Station_16.sql
Weather_Observation_Station_17.sql		Weather_Observation_Station_17.sql
Weather_Observation_Station_19.sql		Weather_Observation_Station_19.sql
Weather_Observation_Station_2.sql		Weather_Observation_Station_2.sql
Weather_Observation_Station_20.sql		Weather_Observation_Station_20.sql
Weather_Observation_Station_3.sql		Weather_Observation_Station_3.sql
Weather_Observation_Station_4.sql		Weather_Observation_Station_4.sql
Weather_Observation_Station_5.sql		Weather_Observation_Station_5.sql
Weather_Observation_Station_6.sql		Weather_Observation_Station_6.sql
Weather_Observation_Station_7.sql		Weather_Observation_Station_7.sql
Weather_Observation_Station_8.sql		Weather_Observation_Station_8.sql
Weather_Observation_Station_9.sql		Weather_Observation_Station_9.sql

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