In this repository, we have SQL problems for practice from beginner level to advanced level using a fictitious database 'Worldwide importers'.

Prometheus Hyperscale and XL Batteries will install what’s known as an organic flow battery at the one-gigawatt data center Prometheus is building in Wyoming. The project will begin as a small ...

Abstract: In the paper, we analyze the shortages of service-oriented analysis and design (SOAD) methodologies, and then review the features of data flow diagram as a kind of requirement analysis ...