PipelineDB is an open-source relational database that runs SQL queries continuously on streaming data, incrementally storing results in table. It is primarily used to build streaming and realtime analytics applications such as realtime reporting dashboards and realtime monitoring and alerting systems. PipelineDB exposes all of its functionality to users via SQL - no application code is required. SQL queries are written once ahead of time and as data streams into PipelineDB and hits these continuous SQL queries the results of the continuous SQL queries are stored in PipelineDB.
For more information, visit http://www.pipelinedb.com/