<Tr> <Td> Oracle Corporation </Td> <Td> 159 </Td> <Td> Oracle </Td> </Tr> <Tr> <Td> Others </Td> <Td> 152 </Td> <Td> Others </Td> </Tr> <Tr> <Td> Total </Td> <Td> 5,700 </Td> </Tr> <Ul> <Li> Mondrian OLAP server is an open - source OLAP server written in Java . It supports the MDX query language, the XML for Analysis and the olap4j interface specifications . </Li> <Li> Druid (open - source data store) is a popular open - source distributed data store for OLAP queries that is used at scale in production by various organizations . </Li> <Li> Apache Kylin is a distributed data store for OLAP queries originally developed by eBay . </Li> <Li> Cubes (OLAP server) is another light - weight open - source toolkit implementation of OLAP functionality in the Python programming language with built - in ROLAP . </Li> <Li> Linkedin Pinot is used at LinkedIn to deliver scalable real time analytics with low latency . It can ingest data from offline data sources (such as Hadoop and flat files) as well as online sources (such as Kafka). Pinot is designed to scale horizontally . </Li> </Ul>

The special type of database configured for business intelligence applications is called a