PROBLEM TO BE SOLVED: To provide a technology for supporting operation of tabular data represented by a delimiter.SOLUTION: A tabular data processing program is adapted to process tabular data in which a plurality of records are registered, each record including a plurality of elements corresponding to a plurality of items. The tabular data processing program makes a computer execute: a longitudinal coupling step of producing one tabular data item by making correspondent items included in a plurality of tabular data items on the basis of user operation; a summarizing step of executing summarization processing for summarizing the records included in the produced one tabular data items while using items included in the one tabular data item as keys on the basis of user operation; and a step of using tabular data with the same constitution of items to store correspondences of items and key items in a storage device at least as re-execution information for executing the same processing as the longitudinal couplin
