SQL
SQL (Structured Query Language) is a domain-specific programming language designed for managing and querying data in relational database management systems (RDBMS). It allows developers to create, modify, and retrieve structured data using operations like SELECT, INSERT, UPDATE, and DELETE. SQL is standardized by ANSI and ISO, though implementations often include vendor-specific extensions.
Developers should learn SQL because it is essential for interacting 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, manipulation, and analysis, making it crucial for backend development, data engineering, and business intelligence tasks. Mastery of SQL improves performance optimization and data integrity in database-driven applications.