Abstract: This information processing device is provided with: data management means in which table-formatted data, with rows in which one group of tuple data units comprising a plurality of attribute data units are positioned and columns in which attributes are positioned, is stored so that the tuple data is collectively stored in a storage device by attribute data; and data processing means which executes predetermined processing with respect to a database. The data management means stores each attribute data unit that configures a tuple data unit in the order in which the tuple data units are positioned in the table format, in a plurality of chunks having storage areas of a predetermined capacity set for each of the attribute data units.