During IR Summit 2019 in Denver, Ricardo Machado presented PQL Advanced - A Deep Dibe into Prognosis PQL. Prognosis Query Language (PQL) is an in-memory, realtime SQL engine created to facilitate the query of Prognosis performance data. PQL implements a subset of the ANSI Structured Query Language (SQL), adding a number of syntax and semantics enhancements to address Prognosis collected data. The PDF of the slide deck is attached.
