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Learn what SQL indexes are, how they speed up queries, and why they matter for applications. Includes examples of indexes and performance comparisons.

Learn what SQL is, why it was created, and how it powers modern databases. Includes examples of tables, queries, and JOINs to help you understand how relational data works in practice.

Learn what shadcn/ui is, why developers love it for building consistent, themeable React interfaces, and how to start using it effectively with Tailwind CSS and Next.js.

Learn how to configure ESLint with the new flat config format in Next.js, ignore unnecessary files for faster linting, and run it efficiently in GitLab CI.

Learn what linters are, why they’re essential for writing clean, consistent code, and how ESLint has become the industry standard for JavaScript and TypeScript projects.