To query a user's mobile phone and WeChat number, the following SQL statement can be used.

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 ...

Aggregate function last_value is found inside another aggregate function in query #53274 Closed as not planned chengjoey opened on Aug 10, 2023 ...