Lenda Dashboard - SQL Practice

Usage:
  1. Choose the chapter which you want to practice on the Main Menu panel / Chapters tab.
  2. Choose the task which you want to solve on the Task Display panel / Task tab (Previous and Next buttons).
  3. Write your query into the Query Editor box. You can "Test" it or "Submit" the solution.
  4. The result will be displayed on the Query Result panel. Your progress is shown on the Chapters tab's progress bar.

Notes:
  - Each chapter builds on the previous ones, solving a task may require knowledge from previous chapters.
  - All exercises follow SQL standards, and the solutions are compatible with most major database systems. (Only very few exceptions exist, they are indicated.)
  - The website is under continuous development, and the tasks are evolving and expanding.
  - If you have any suggestions or questions, please send an email to lendakft@gmail.com.

Layout:
  - Panels are resizeable, klick on the gray area between them then hold and move as you want.
  - You can swap panels also by simply dragging and dropping them.

Tips:
  - If the task is not clear then use the "Hint" tab and / or the "Expected result" tab.
  - You can change task by clicking on any segment of the progress bar.