David Langer joins us to discuss his work as a data analytics educator and his beliefs in the use of Excel, SQL and R in analytics work.In this episode you will learn:\u2022 Intro to Dave on Data [6:50]\u2022 20% analytics that drives 80% of ROI [11:04]\u2022 The benefits of SQL [19:15]\u2022 The uses of R [24:50]\u2022 Machine learning [34:15]Additional materials: www.superdatascience.com/475