A brief study of hotels in Vietnam

This is a brief study I did over the weekend about hotels in three popular travel destinations in Vietnam namely Hanoi, Nha Trang, and Phu Quoc. Key observations: - Hanoi ranks first on the total hotel capacities, followed by Nha Trang, with Phu Quoc quite further behind. - 2-to-3 star hotels dominate the market in …

Data transformation, Scala collections, and SQL

Data transformation is one of the 3 steps in ETL (extract, transform, load) -- a process for getting raw data from heterogeneous sources (e.g. databases, text files),  process or transform, then loading it to the final source (e.g. in a format ready for further modelling or analysis). While there exist a plethora of languages for …