Event processing (EP) is widely used for reacting on events in the very moment when they occur. Events that require immediate reactions can be found in various applications, e.g. algorithmic trading, business process monitoring and sensorbased human-computer interaction. For the support of EP in an application, a specialpurpose EP system with its own API and query language has to be used. Typically, EP systems as well as their integration in applications are expensive. In this paper, we show how every standard database system can be used as an EP system via JDBC. An experimental evaluation proofs that databases behind JDBC are able to support small and medium-sized EP workloads.