Malek Damiri shows how to backtest a customer health score in SQL: point-in-time snapshots, churn by band, and AUC against a ...

NRR is easy to inflate by accident. Runnable SQL for net and gross revenue retention, the retention bridge, a monthly trend, ...

For those new to data analysis, I have compiled a list of free sites where you can practice SQL, methods for setting up your own practice environment, and 10 practice problems to review the content of ...

Profitable Stocks is one of the five questions in the HackerRank SQL (Basic) certification test. It is short. The two things to get right are the comparison and the sort. There is one table of today’s ...

What happens when AI moves from helping job candidates to evaluating them? HackerRank, a platform used by companies to assess and hire developers, is offering a glimpse at what that future of job ...

Non-technical analysts are building stunning dashboards with AI in hours — but they hit a wall when trying to share them company-wide. Speaking on The Hedgineer Podcast, Hedgineer co-founders Jhanvi ...

Cursor says its new agent swarm passed 80% of a held-out SQL test suite within four hours, while its previous system failed before hour two. The result came from a demanding experiment: rebuilding ...

Carley Millhone is a writer and editor based in the Midwest who covers health, women's wellness, and travel. Her work has appeared in publications like SELF, Greatist, and PureWow. Jay N. Yepuri, MD, ...

Earnings over $24,480 (2026) before full retirement age reduces Social Security benefits. Claimed Social Security early; half of earnings above the threshold are withheld. Benefits recalculated at ...

So, you’re wondering if HackerRank is free to use, right? It’s a common question, especially when you’re looking to practice coding skills or maybe even hire some new talent. Many platforms offer a ...

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 ...