SQL

SQL (Structured Query Language) is the standard language for storing, managing, and retrieving data from relational databases. This category guides learners through SQL fundamentals, from building databases and designing tables to writing efficient queries using SELECT, INSERT, UPDATE, DELETE, and JOIN operations. Understanding SQL is essential for backend development, data analysis, and any role that works with data-driven applications. Learners will explore real-world examples, best practices, indexing, normalization, transactions, and security concepts. The lessons are structured to build confidence step-by-step, enabling learners to handle complex queries and optimize database performance. By the end of this category, learners will be able to design scalable database schemas, write advanced SQL queries, and integrate SQL into web applications. Whether you are a beginner or preparing for a tech career, mastering SQL opens opportunities in software development, data analytics, business intelligence, and more.