In columns of a table, a list of labels of records of a table referenced by the table as a relation is displayed. A correlational display function of the record of interest enables information on a table involving an operator to be grasped in one table. When a record of the table of the reference origin is selected, a record referenced by the selected record is highlighted. Conversely, when a record of the reference destination is selected, the record of the reference origin referencing the selected record is highlighted and the related record is displayed in the same line or in the neighborhood. The reference, addition or change of a record of the reference destination can be intuitively performed around the table of the reference origin. A new record can be added to the reference destination during the addition of a record to the table of the reference origin. Information on the table of the reference destination is allowed to be grasped and managed with only an operation focusing on one table.