Week 2 was all about data visualisation. We learnt about how the brain responds to visualisation cues, explored techniques to build a good infographic and then moved into working with Tableau and Big Data.
After a long application process and a month of waiting, the Data School finally started. What did DS12 do during their first week?
When should I use a join? What type of join should I use? When should I use a union instead?
This blog post it is an introduction to the concept of joins and unions that hopes to answer these questions.