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CS50's Introduction to Programming with R
Data analysis and visualisation with R.
CS50's Introduction to Databases with SQL
Design and query relational databases.
What is Data Science?
IBM's introduction to the field, the tools and the job of a data scientist.
The Data Scientist's Toolbox
Johns Hopkins: R, RStudio, Git and GitHub for data science.
SQL for Data Science
UC Davis: write SQL queries to filter, sort and analyse data.