MySQL Playground-interactive SQL learning platform

Example

CREATE TABLE `users` (`id` INT AUTO_INCREMENT PRIMARY KEY, `name` VARCHAR(255), `email` VARCHAR(255) UNIQUE);

Scenario

Users can learn how to define and alter table structures, implementing best practices for data integrity and efficiency. This is crucial for setting up databases for new applications or modifying existing structures for better performance.

Example

SELECT `name`, `email` FROM `users` WHERE `created_at` > '2021-01-01';

Scenario

The platform teaches how to insert, update, delete, and select data, with a focus on constructing queries to extract meaningful insights from the database, such as retrieving user information based on specific criteria.

Example

SELECT `product_id`, SUM(`quantity`) OVER (PARTITION BY `product_id` ORDER BY `sale_date`) AS `running_total` FROM `sales`;

Scenario

It offers guidance on using advanced SQL features like window functions, common table expressions (CTEs), and indexes. These are essential for performing complex data analysis and optimizing query performance, for example, calculating running totals or hierarchical data processing.