The purpose of this article is to present a methodological approach about the construction of a decision-making system for the implementation of a number of descriptive and predictive techniques using the query tools (SQL OLAP or MDX) and the process of Data Mining. The field of human resources (HR) is chosen as an application area. This field is currently an important subject in both the business and the scientific research world. Also, Human Resource analytics (HR analytics) is one of the most important emerging and disparate technologies of HR for the coming years. Ralph Kimball's approach is used to build this system with Microsoft technologies.