Learning Nested Subqueries: How SQL Taught Me to Untangle Code Like a Philosopher When I started learning SQL, I expected to pick up a few practical skills: how to pull data, write clean queries, ...

Unlock the power of SQL for math and statistics! In this lecture, we cover everything you need to perform essential calculations and statistical analysis directly in your database. Perfect for ...

このリポジトリは、アルゴリズム、データ構造、数学、SQLの実装を集約したマルチ言語教育プラットフォームです。競技プログラミング（LeetCode、HackerRank、AtCoder）、技術面接対策、コンピュータサイエンス教育向けに最適化されています。

select productline, floor(avg(buyprice)) as avgbuyprice,ceil(avg(buyprice)) as avgbuyprice_1 from products group by productline; ...