SQL

LeetCode selected problems

Only high-quality problems are selected. Pathological problems and entry-level syntax problems are not included.

And ‘solution’ column will be updated once I start to work on ‘em!

#	Problems	Solution	Level	Concept
262	Trips and Users	🤭	Hard	Three-way join; filtering
185	Department Top Three Salaries	🤭	Hard	Non-equijoin; aggregation; window functionsample
579	Cumulative Salary of Employee	🤭	Hard	Self-join; left join; aggregation
601	Human Traffic of Stadium	🤭	Hard	Self-join; de-duplication; window
615	Average Salary	🤭	Hard	Case; aggregation, join
618	Students Report By Geography	🤭	Hard	Full join, pivoting