A method including extracting data spanning a computational interval from a plurality of database tables in an optimized manner, creating an array of each column of data that is extracted, accessing each array via a standardized programmatic interface to manipulate the data, if needed to perform computations, normalizing the accessed data to a common interval or interpolating the accessed data to derive missing items based on the common interval, performing the computations on the accessed data, and outputting results of the computations to a storage medium or an output device. A corresponding system and computer program product.