A query language is a type of programming language used to make requests for information from databases. It allows users to retrieve, update, and manipulate data stored in a structured format. One of the most well-known query languages is SQL (Structured Query Language), which is widely used for managing relational databases. Query languages provide a way to communicate with databases using specific syntax and commands. Users can write queries to filter data, sort results, and perform calculations. This makes it easier to extract meaningful insights from large datasets, enabling businesses and organizations to make informed decisions based on the information retrieved.