SQL Databases
SQL databases are relational database management systems (RDBMS) that store and manage structured data using the Structured Query Language (SQL) for defining, querying, and manipulating data. They organize data into tables with rows and columns, enforcing relationships and constraints to ensure data integrity and consistency. Common examples include MySQL, PostgreSQL, and Microsoft SQL Server.
Developers should learn SQL databases for applications requiring structured, transactional data with ACID (Atomicity, Consistency, Isolation, Durability) compliance, such as e-commerce platforms, financial systems, and enterprise software. They are ideal when data relationships are complex and need to be queried efficiently using joins and aggregations, offering robust features for data security, backup, and scalability.