The various embodiments herein provide a method for representing OLAP (Online Analytical Processing) queries in a data grid in real time. The method comprises of providing a new OLAP query, building a directed acyclic graph structure for the OLAP query, initializing the graph structure by generating signals for one or more business entities, processing the generated signals of one or more entities, linking entities based on matching of query filter parameters specified in the OLAP query and calculating aggregate values at one or more nodes. The nodes in the directed acyclic graph comprises: a plurality of blue nodes adapted to maintain links to one or more business entities stored in a datagrid and to hold the aggregate values and a plurality of grey nodes adapted to hold the calculated aggregate values. The aggregate values comprise at least one of SUM, ACCOUNT and AVG.