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Simple JOINs recap
Various kinds of JOINs
Filtering with LEFT JOIN and RIGHT JOIN
17. Get ready


Now, we'll consolidate our knowledge with four exercises. However, this time we won't explain the tables. This is to better simulate the reality of SQL programming — which is that sometimes, you don't have access to proper database documentation. Don't worry, just take a look at the Database tab on the right: you can easily guess the purpose of each column.

Good luck!


Click the Next exercise button to continue.