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HTML Exercises Many chapters in this tutorial end with an exercise where you can check your level of knowledge.

Python Exercises Many chapters in this tutorial end with an exercise where you can check your level of knowledge.

Our SQL tutorial will teach you how to use SQL in: MySQL, SQL Server, MS Access, Oracle, Sybase, Informix, Postgres, and other database systems. Start learning SQL now »

Learn JavaScript The programming language of the Web. JavaScript is easy to learn. This tutorial covers everything from basic JavaScript up to the latest 2025 version. Start learning …

Click on the "Run example" button to see how it works. We recommend reading this tutorial, in the sequence listed in the left menu. C++ is an object oriented language and some concepts may …

PHP Tutorial PHP is a server scripting language, and a powerful tool for making dynamic and interactive web pages.

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Node.js Exercises Many chapters in this tutorial end with an exercise where you can check your level of knowledge.

MongoDB is a document database. It stores data in a type of JSON format called BSON. If you are unfamiliar with JSON, check out our JSON tutorial. A record in MongoDB is a document, …