SQL

SQL (Structured Query Language) is a domain-specific programming language designed for managing and manipulating relational databases. It allows developers to create, query, update, and delete data, as well as define database schemas and control access. SQL is standardized by ANSI and ISO, though implementations often include vendor-specific extensions.

Also known as: Structured Query Language, Sequel, SQL-92, ANSI SQL, Structured Queries

Why learn SQL?

Developers should learn SQL because it is essential for working with relational databases, which are widely used in applications requiring structured data storage, such as e-commerce, finance, and content management systems. It enables efficient data retrieval, aggregation, and transaction management, making it crucial for backend development, data analysis, and reporting tasks.

Learning Resources

• tutorial: W3Schools SQL Tutorial
• tutorial: SQLZoo Interactive Exercises
• docs: PostgreSQL Documentation
• course: Khan Academy Intro to SQL
• tutorial: SQLBolt Interactive Lessons