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sql · level 1 · unit 1 · lesson 1

  1. meet it
  2. guess first
  3. your turn
  4. fix it
  5. nailed it

Tap a green word if you get lost.

meet it

A is a spreadsheet you can ask questions.

A database is where a computer keeps information neat and tidy. Inside it are tables. A is a grid about one kind of thing, like the puddings on a café menu.

Each is one thing, such as one pudding. Each is one detail, such as the price. The top line gives each column its name.

You never dig through a database by hand. You write it a question and it hands back the answer. Write two and it answers them in order, top line first. It never guesses what you meant.

SELECT * FROM puddings;

Press run and this question shows the whole puddings table, and next lesson you will learn to read it.