The three major types of OLAP are Multi-dimensional OLAP, which we have just discussed, apart from relational OLAP and Hybrid OLAP. MOLAP is widely used for its quickness and the ability of providing the required data and reports in dynamic manner, which is more informative to the decision makers of the organization. The relational OLAP is a system which takes the data directly from the relational database to display they reports or query results. Relational database is a system which stores the data which is organized in formally described tables which provide the data and reassembles it in many ways without reorganizing the tables of the database. A hybrid OLAP uses both the MOLAP and ROLAP system in providing the results.