Abstract: A data compiling method for conversion into the form of an information block containing a value list in which table format data expressed as an array of records including items and item values contained in the items are so arranged that the item values are arranged in a predetermined order without any redundancy, and a position designation array including position designation numbers designating the item values in the value list and related to the record numbers. Adjoining partial intermediate blocks (811-0, 811-1) which include an item value array having item values related to the record numbers, an order designation array (VLP) for designating the positions of the item values in the item value array, and a position designating array (PV) for designating elements in the order designation array are merged to create a new partial intermediate block (812-0), and the operation of merging the partial intermediate blocks is repeated till the blocks are merged into one.