Master SQL: Your Path to Data Mastery

Ready to sharpen your SQL skills? Our carefully curated SQL roadmap is packed with real-world challenges, from basic queries to advanced functions and joins. Whether you're new to SQL or looking to refine your expertise, these exercises will guide you step-by-step to becoming a proficient SQL pro. Start solving now and elevate your data manipulation skills!

Problem	Difficulty	Category
Revising the Select Query I	Easy	Basic SQL
Revising the Select Query II	Easy	Basic SQL
Select All	Easy	Basic SQL
Select By ID	Easy	Basic SQL
Japanese Cities' Attributes	Easy	Basic SQL
Weather Observation Station 1	Easy	Basic SQL
Weather Observation Station 3	Easy	Basic SQL
Weather Observation Station 5	Easy	Basic SQL
Employee Bonus	Easy	Basic SQL
The PADS	Easy	Basic SQL
Sales Analysis I	Easy	Aggregation
Sales Analysis II	Easy	Aggregation
Customer Who Visited But Did Not Make Any Transactions	Easy	Joins
Customers Who Never Order	Easy	Joins
Product Sales Analysis I	Easy	Joins
Actors And Directors	Easy	Functions
Rising Temperature	Easy	Functions
Duplicate Emails	Easy	Functions
Big Countries	Easy	Functions
Weather Observation Station 10	Medium	Basic SQL
Employee Salaries	Medium	Basic SQL
Population Density Difference	Medium	Aggregation
Average Population	Medium	Aggregation
Weather Observation Station 20	Medium	Aggregation
Weather Observation Station 18	Medium	Aggregation
Weather Observation Station 19	Medium	Aggregation
Product Sales Analysis II	Medium	Joins
Employee Department	Medium	Joins
Employee Department	Medium	Joins
Employee Department II	Medium	Joins
Employee Department III	Medium	Joins
Actor Names	Medium	Subqueries
Weather Observation Station 9	Medium	Subqueries
Weather Observation Station 15	Medium	Subqueries
Weather Observation Station 17	Medium	Subqueries
Weather Observation Station 22	Medium	Subqueries
Nth Highest Salary	Medium	Subqueries
Rank Scores	Medium	Subqueries
Dense Rank	Medium	Subqueries
Customers Who Bought All Products	Medium	Functions
Consecutive Numbers	Medium	Functions
Exchange Seats	Medium	Functions
Weather Observation Station 16	Medium	Functions
Sales Analysis III	Medium	Aggregation
Weather Observation Station 21	Hard	Aggregation
Top Earners	Hard	Basic SQL
Median Employee Salary	Hard	Subqueries