These extra problems are not submitted for feedback or grading, but we highly recommend that you work through some of them to help cement your understanding of the material.
In case you're in the mood for more relational algebra beyond the quiz and the interactive workbench exercises (or you found the syntax required by the workbench exercises annoying), we've compiled an extra set of Relational Algebra Exercises to be worked in writing. Answers are provided, but they are hidden until you press the "Show Answers" button. Additionally, relational algebra is a core topic in every database course, and every textbook includes many examples and exercises. Visit the Readings page for a list of recommended textbooks.
To expand upon the Relational Design quiz, we've compiled an extensive set of Relational Design Exercises to be worked in writing. Some of the problems are similar to the quiz questions, while others are more in-depth and consider more concrete real-world scenarios. Answers are provided, but they are hidden until you press the "Show Answers" button. Additionally, relational design theory — dependencies and decomposition specifically — are core topics in every database course, and every textbook includes many examples and exercises. Visit the Readings page for a list of recommended textbooks.
We've compiled some additional UML Exercises to be worked in writing. These exercises are similar to the UML Quiz but give you additional practice. Answers are provided, but they are hidden until you press the "Show Answers" button.