Learn about graph databases and related techniques and technologies including graph algorithms and graph modeling. We will cover the two types of graph databases: property graph databases and Resource Descriptor Framework (RDF) graph databases. Examples of property graph databases are Neo4j, OrientDB, and FlockDB. Examples of RDF graph databases are Blazegraph, AllegroGraph, and Giraph. Graph algorithms are then explored including PageRank, Betweenness, Closeness, and Eigen Centrality. Learn the types of business questions that are great candidates for a graph database. Variations in graph modeling are discussed as well, including domain models and property graph models.