Interacting with the "terminal," or "shell."
Where to learn it: Codeacademy, data36
> echo 'hello world'
> print(hello world)
> println("hello world")
<script>
console.log("hello world")
</script>
Case study 1: When I'm learning SQL from scratch
stackoverflow
try to build a database out of spreadsheets
realized I didn't know how to import a csv into MySQL db
w3schools tutorials
realized that my unique key wasn't unique
read MySQL documentation