What purpose does a query language serve?

A query language is fundamentally designed to facilitate communication with a database by allowing users to retrieve, manipulate, and manage data stored within it. This type of language serves as the interface between a user and the database, enabling the formulation of queries to extract specific information or to modify data. These queries can take various forms, such as fetching records, updating entries, or constructing new datasets based on existing information.

For instance, SQL (Structured Query Language) is an established query language that allows users to perform complex queries and transactions in relational database systems. Its syntax and commands are tailored to execute precise actions like selecting data, filtering results, or joining multiple tables to create a comprehensive view of related information.

The other choices relate to distinct categories. A programming language for automated testing focuses on writing scripts to test software, whereas a system for data encryption revolves around securing data. A framework for developing web applications is concerned with building the structure and functionality of web-based applications. These do not share the direct purpose of interacting with databases as clearly as a query language does.