HackerRank isn’t just a random collection of problems; they’ve organized their SQL section pretty well. You can find ...

Abstract: In modern cities, more and more people drive the vehicles, equipped with the GPS devices, which create a large scale of trajectories. Gathering and analyzing these large-scale trajectory ...

What if mastering a handful of Excel functions could save you hours each week, eliminate frustrating errors, and even make you the go-to problem solver in your office? It’s not just a bold claim—it’s ...

While the PIVOTBY function can only reference source data in Excel, if you create a PivotTable in Excel 2016 or later or Excel for Microsoft 365, you can choose to pull in data from an external source ...

Pecora Corporation has announced an addition to the Traffic Coatings and Sealants line with Pecora-Deck HB1100-SA. The product is an integral aggregate, single-coat application, polyurethane ...

An aggregate function error in SQL occurs when you try to use an aggregate function in a way unsupported by the SQL language. You may experience the error if you do ...

SQL Window functions are an advanced type of function in SQL. In this post, you will learn about what SQL window functions are and how they can be used or work. What are SQL window functions? SQL ...