Data Query Languages (DQL) are specialized programming languages used to retrieve and manipulate data stored in databases. They allow users to ask questions about the data, such as finding specific records or summarizing information. The most common DQL is SQL (Structured Query Language), which is widely used in relational databases to perform tasks like selecting, inserting, updating, and deleting data. These languages provide a way for users, including data analysts and software developers, to interact with databases without needing to understand the underlying complexities of data storage. By using DQL, users can efficiently access and manage large amounts of information, making data-driven decision-making easier.