A system is provided including a memory in communication with a processor. The memory is to store a data source comprising source data. The processor is to store in a row of a table: a source identifier of the data source, a data category value, and an aggregation identifier of an aggregation operation. The processor is also to execute the aggregation operation against the source data based on the data category value to obtain a measure related to the source data. In addition, the processor is to store the measure in the row, and output the table.