DeltaStream offers a real-time solution for maintaining up-to-date driver ratings in rideshare applications, which is crucial for ensuring driver eligibility and safety. By connecting a Kafka cluster with DeltaStream, data from a "driver_ratings" topic can be streamed and processed to calculate average ratings and review counts for each driver. This is achieved by using SQL queries to group data by driver IDs and apply aggregation functions like AVG and COUNT, with results stored in a materialized view. DeltaStream continuously updates this view as new data arrives, allowing downstream applications to access current driver ratings and make informed decisions on driver suspensions. This real-time processing capability not only enhances rideshare services but also demonstrates DeltaStream's broader potential in various industries that rely on accurate and timely rating systems.