What is the main function of queries in a database system?

The primary function of queries in a database system is to retrieve specific data from different tables. Queries are structured commands, often written in a language such as SQL (Structured Query Language), that allow users to request and extract precise pieces of information based on defined criteria. This makes it possible to filter, sort, and manipulate data from one or more tables in a database to obtain desired results.

The importance of queries lies in their ability to interact with complex data relationships and provide the needed insights for decision-making. By using queries, users can easily access and analyze the data that is pertinent to their needs without directly altering the underlying data structure. This retrieval process is fundamental to effectively utilizing database systems, as it allows for targeted data analysis and reporting.

While other options mention related functions like adding programming functionality, summarizing data, or managing user interactions, those are more supplementary to the core role of queries, which is primarily focused on data retrieval. Thus, the correct option emphasizes the essence of what queries are designed to do in a database context.