SQL
SQL (Structured Query Language) is a standardized programming language used 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 essential for interacting with relational database management systems (RDBMS) like MySQL, PostgreSQL, and SQL Server.
Developers should learn SQL because it is fundamental 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, complex joins, and transaction management, making it crucial for backend development, data analysis, and reporting tasks.