Graph Databases. Just hype, or the end of the relational world

They enable new powerful analytics using built-in graph algorithms and the PGQL language. Since 2015 Oracle offers a graph database with Oracle Spatial and Graph. The graphs can be stored in Oracle NoSQL, Apache HBase or an Oracle Database. The analytics are performed by an in-memory engine for optimal performance. In this paper we explain the fundamentals of property graph databases and highlight use cases where property graph implementations are superior to relational technologies.