In the context of databases, what do SQL databases mainly handle?

SQL databases are primarily designed to manage structured data. Structured data refers to information that is organized in a defined format, often residing in relational databases where data is stored in rows and columns. This facilitates easy querying and analysis using Structured Query Language (SQL).

Using SQL allows for efficient data manipulation and retrieval, as the rigid structure ensures that data conforms to specific types and formats, making it easier to enforce data integrity and relationships through keys and constraints. This is particularly important in applications where consistency and structure are essential, such as banking or inventory systems.

The other options relate to different types of data handling. Unstructured data is information that doesn't follow a specific format, such as videos or text documents, while semi-structured data may have some organizational properties but doesn't fit neatly into tables, such as JSON files. Real-time data refers to information that is processed immediately upon collection, which could exist in both structured and unstructured formats but isn't the primary focus of SQL databases.