1. A computer implemented method of managing and updating a data repository in real time, comprising: retrieving at least one record from a stream of incoming records maintained in a load repository, wherein the at least one record is associated with a unique identifier; matching at least one record with a previous record history maintained in a detail repository based on the unique identifier; determining an action type to be performed corresponding to the at least one record, wherein the action type is determined based on an output of a matching condition, wherein the matching condition corresponds to performing a detail match, a master match, and a same master match sequentially, and wherein the detail match is performed by matching an incoming record with at least one of the previous record history, the master match is performed by matching the incoming record with at least one of a previous master record history maintained in a master repository using a predefined matching criteria, and the same master match is performed by matching an output of the detail match with an output of the master match, wherein the output of the detail match corresponds to a unique identifier of the matched previous record in the detail repository and the output of the master match corresponds to a unique identifier of matched master record in the master repository and wherein the output of the matching condition corresponds to output of the same master match; performing the action type on the at least one record based on the determination thereby providing a unique and updated record for all matching records in the data repository, wherein the action type is one of an update action, an auto merge action, an auto consolidate action, an update new action and a new action; and wherein the predefined matching criteria comprises a batch matching criterion to obtain a best match for the at least one record in the master repository and a probable matching criterion to obtain a probable master record for the at least one record in the master repository.