Ever tried to learn SQL, the query language that lets you ... In the game, you start by getting your bearings—what tables are in this database?—and as you do, you find clues to follow up ...

Read this SQL tutorial to learn ... used methods for consolidating data across multiple tables. While some of these options may affect performance, practice will help you know when it’s ...

For example, missing a WHERE clause in your instructions can cause you to delete an entire table ... practice is a necessary requirement. So why is SQL still the leading way to work with data ...