Solutions to Problems For SQL on Leetcode, Hackerrank & DataLemur
Advanced SQL workbook: subqueries, window functions, CTEs, recursive CTEs, and datetime practice.
SQL skills challenge. A small but complete, beginner friendly project to practice basic/intermediate SQL skills.
An SQL analysis exploring the relationship between reported crimes in Chicago and the average daily temperature from 2018 through 2023.
An SQL data cleaning project
A list of the most common entry level SQL interview questions and answers.
SQL Case study solutions for #8WeekSQLChallenge by Danny Ma
An SQL analysis of traffic accidents within the City of Chicago limits and under the jurisdiction of Chicago Police Department (CPD).
Aliens of America. A portfolio building dataset provided by Ian K. on LinkedIn.
📚 My SQL learning journey — practicing from basics to advanced queries, joins, subqueries, views & more.
SQL/MySQL Cheatsheet and Practice Questions
i tried to solve as many tasks as possible to make my SQL skills better
SQL Case Files is a free interactive SQL game that teaches SQL through crime-solving challenges. Learn SQL online with hands-on puzzles, realistic datasets, SQL practice exercises, and a full browser-based SQLite database. Perfect for beginners learning SQL, data analysts preparing for interviews, and anyone who wants to practice SQL for free.
A professional SQL project demonstrating core database management techniques, including CRUD operations, data validation, safe deletions, and transaction management.
One SQL problem a day for a year
Dictionary Challenge: An SQL project using basic/intermediate SQL practices with one column of English words.
A professional SQL project demonstrating the implementation of relational database concepts, focusing on Foreign Key Constraints and ON DELETE CASCADE behavior.
A dataset used to explore work-related fatalities in the United States.
Production-ready SQL Engineering Handbook with SQL tutorials, interview questions, real-world projects, query optimization, window functions, and analytics engineering examples.
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