Data in a database lives in tables. A table looks like a spreadsheet:

• each row is one thing — here, one song;
• each column is one fact about every thing — its title, its year, its plays.

Try it: tap a few cells, then press Run. SELECT * FROM songs; is your first SQL query: "show everything in the songs table".

The chips under the editor show the order SQL works through a query. This query lights up two of them; each step of the lesson adds one more.