Six Snowflake SQL patterns for revenue reporting: date spines, time zone cutoffs, QUALIFY dedupes, running totals, freshness ...

The motivation for using MongoDBIn my previous workplaces, there were many cases where Elasticsearch, DynamoDB, or similar ...

Hello, it's Udon. 🍜I'm looking for customers who haven't ordered yet in the udon shop's database. This is to send them a ...

I want to note right away that this article is written exclusively for people who are just starting their journey in learning SQL and window functions. It may not cover complex applications of ...

Consistent SQL practice across varied platforms builds real job-ready confidence. Guided lessons help beginners, while timed challenges sharpen interview performance. Real datasets improve practical ...

Каждый, кто работает с SQL, рано или поздно усваивает "золотое правило": "Никогда не используй коррелированные подзапросы в SELECT!". Нам говорят ...

This project demonstrates my SQL and data analysis skills using the FIFA 26 (FC 26) player dataset. The dataset includes detailed information about football players, their clubs, leagues, and stats.

Why is the language developers and DBAs use to organize data such a mess? Here are 13 reasons we wish we could quit SQL, even though we probably won't. For all its popularity and success, SQL is a ...

SQL is successful because the language declares what data should come out of each query without specifying exactly how the engine should execute it. However, SQL can get confusing for new users to ...

EF Core 9.0 (EF9) was released in November 2024 and is a Short Term Support (STS) release. EF9 will be supported until November 10, 2026. EF9 is available as daily builds which contain all the latest ...