One of the primary features of Teradata Studio is:

Teradata Studio is a powerful tool designed to facilitate database development and administrative tasks within the Teradata ecosystem. One of its primary features is the ability to build and edit SQL requests visually. This allows users to create complex SQL queries using a graphical interface, which reduces the likelihood of syntax errors and improves productivity. This visual approach is particularly beneficial for those who may not be as well-versed in SQL, enabling them to construct queries by simply dragging and dropping components rather than writing code manually.

This emphasis on a user-friendly design enhances overall efficiency by allowing users to focus on query logic and data manipulation rather than on learning intricate SQL syntax. It also provides a platform where one can easily visualize and test SQL queries before executing them against the database.

The other options, while related to data management and analytical tasks, do not accurately represent the core functionality of Teradata Studio. Creating machine learning models typically requires specialized tools and environments, visualizing financial data trends would necessitate different software that focuses on data analytics, and managing user permissions and roles is typically handled through different administrative tools rather than Teradata Studio's primary functions.