HackerRank is a tech company that focuses on competitive programming challenges for both consumers and businesses, where developers compete by trying to program according to provided specifications.

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SQL (Structured Query Language) — язык запросов для работы с реляционными базами данных, который появился больше 50 лет назад и остаётся одним из самых ...

Intermediate core-plus bond funds offer the next step up in risk and yield from intermediate core bond funds. Investors who are willing to take on that extra risk to obtain potentially higher returns ...

user_id = 99 не существует в users, а пользователи Anna (4) и Kemal (5) не делали заказов. Это важно для понимания JOIN-ов. Потому что тестировать через UI — это ...

Thinking about getting into coding or leveling up your skills? You’ve probably heard of HackerRank. It’s a big name in the tech world for practice and hiring. But the big question on a lot of people’s ...

Getting good at SQL for interviews can feel like a puzzle. You know the basics, but putting them together in a way that impresses people is another thing entirely. Luckily, there are great tools out ...

Intermediate core bond funds often form the foundation of bond portfolios, and these top-rated funds offer some of the best options for investors. To screen for the top-performing funds in this ...

🎓 Verified and optimized solutions to the HackerRank SQL Certification Test — covering Basic, Intermediate, and Advanced levels. Ideal for certification preparation, SQL interview practice, and MySQL ...

本项目是作者针对 HackerRank平台上的一系列 SQL 题目所编写的解决方案。这些解决方案主要使用 DB2 语法编写，目的是为了提供一个学习 SQL 和 练习 SQL 的实例库。项目包含了基础的 SQL 查询，以及 ...