If you have followed the examples, you have successfully built a basic data warehouse with service classes. The core components include, a data feed RTE that generates random data, a TP that captures data and publishes to relevant subscribers, and an RTE that aggregates data in realtime. The LR does intraday writedowns that divides and saves data on the RDB, IHDB, and HDB.
However, data is only of use when we are able to effectively extract them. In the next section, we will go over how to query this data using multiple clients.