This page is dedicated to the series of blog posts, related to the Graph Engines.
SQL Graph, part I – Nodes & Edges in SQL Server 2017
SQL Graph, part II – The Edge Constraints
SQL Graph, part III – Derived Tables & Views
SQL Graph, part IV – Merge DML Support (aka MATCH support for the MERGE against the Edges)
SQL Graph, part V – Shortest Path
SQL Graph, part VI – Closeness Centrality