Currently, the concept of ‘Knowledge Graph (KG)‘ is popular in the business world. A KG is seen as a potential solution to the ‘data silo problem‘, by providing a unified view of data. In this article we compare enterprise Knowledge Graphs with other solutions offering a unified view of data. In a second step, we propose a definition for the concept of ‘Enterprise Knowledge Graph (EKG)‘. Finally, we illustrate the EKG concept through a ‘Team of Teams‘ project of a real company and carry out an implementation experimentation of this EKG using two systems: using relational and graph databases.