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 but has vendor-specific dialects like MySQL, PostgreSQL, and SQL Server.
Developers should learn SQL because it is essential for interacting with relational databases, which are widely used in applications for data storage, retrieval, and analysis. It is crucial for backend development, data engineering, and business intelligence, enabling tasks such as writing complex queries, optimizing performance, and ensuring data integrity in systems like e-commerce platforms or financial software.