Data Query Language (DQL) is a subset of Structured Query Language (SQL) used to retrieve data from a database. It allows users to perform queries to extract specific information, making it easier to analyze and manipulate data stored in relational databases. The most common DQL command is SELECT, which enables users to specify the data they want to retrieve. DQL is essential for data analysis and reporting, as it helps users interact with databases without needing to understand the underlying structure. By using DQL, individuals and organizations can efficiently access and utilize their data for decision-making and insights.