SQL Server 2017 and Azure SQL Database introduced native graph database capabilities used to model many-to-many relationships. The first implementation of SQL Graph introduced support for edges to represent relationships, nodes to represent entities and a new MATCH predicate to support graph pattern matching and traversal. We will be further expanding the graph database capabilities... Read more

https://blogs.msdn.microsoft.com/sqlserverstorageengine/2018/07/16/match-support-in-merge-dml-for-graph-tables/