Structured Query Language

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

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

Why learn Structured Query Language?

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 critical for backend development, data analysis, and reporting tasks.

Learning Resources

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