1. A computing system for generating a summary data of a set of data, the computing system comprising: one or more processors configured to run one or more modules stored in non-tangible computer readable medium, wherein the one or more modules are operable to: receive a first set of data and a second set of data, wherein the first set of data comprises a larger number of data items compared to the second set of data; process the first set of data to format the first set of data into a first structured set of data; generate a first summary data using the first structured set of data by operating rules for summarizing the first structured set of data, and store the first summary data in a data store; process the second set of data to format the second set of data into a second structured set of data; generate a second summary data based on the first structured set of data and the second structured set of data by operating rules for summarizing the first structured set of data and the second structured set of data; determine a difference between the first summary data and the second summary data; and update the data store based on the difference between the first summary data and the second summary data.