Prior to SQL Server 2017, relationships in graph structures were represented by junction tables. SQL Server 2017 supports graph databases by bringing graph extensions called SQL Graph features. SQL Graph and graph extensions are part of the SQL Server database engine. You don't need to install separate services; as soon as you install SQL Server, you can use SQL graph capabilities in all SQL Server editions.
In SQL Server 2017, you can create two types of graph objects, node and edge tables, and use the new MATCH clause to traverse through the graph. Node and edge tables are normal tables with some special columns and attributes. A graph is a collection of node and edge tables, and all tables within a database ...
