Automatic aggregation method, automatic aggregation apparatus, and recording medium having automatic aggregation program

An automatic aggregation apparatus for automatically aggregating a plurality of records using a computer, the plurality of records each including a plurality of items including a key parameter and a numerical value which is at least related to the key parameter, the apparatus comprising:

• a control section for executing automatic aggregation processing, which includes the steps of:
• (a) inputting one of the plurality of records to the computer;
• (b) adding at least one node, representing contents of the input record, to a position, corresponding to the key parameter included in the input record, of a hierarchical tree;
• (c) updating a value of the at least one node added to the hierarchical tree and a value of a node on a level higher than that of the at least one node, in accordance with the numerical value included in the input record;
• and
• (d) repeating steps (a) through (c) until all the plurality of records are processed, thereby outputting an aggregation result for each of items of the key parameter,
• wherein step (b) comprises a step of determining whether a node corresponding to the key parameter already exists in the hierarchical tree, wherein:
• (b1) if it is determined that the node corresponding to the key parameter already exists, then a new node corresponding to the key parameter is not added, and at least one node corresponding to a parameter which is not the key parameter is added to the hierarchical tree;
• and
• (b2) if it is determined that the node corresponding to the key parameter does not exist, then a new node corresponding to the key parameter and at least one node corresponding to a parameter which is not the key parameter are added to the hierarchical tree.

A computer readable recording medium having a program, stored thereon, for causing a computer to execute automatic aggregation processing for automatically aggregating a plurality of records, the plurality of records each including a plurality of items including a key parameter and a numerical value which is at least related to the key parameter, the automatic aggregation processing, which includes the steps of:

• (a) inputting one of the plurality of records to the computer;
• (b) adding at least one node, representing contents of the input record, to a position, corresponding to the key parameter included in the input record, of a hierarchical tree;
• (c) updating a value of the at least one node added to the hierarchical tree and a value of a node on a level higher than that of the at least one node, in accordance with the numerical value included in the input record;
• and
• (d) repeating steps (a) through (c) until all the plurality of records are processed, thereby outputting an aggregation result for each of items of the key parameter,
• wherein step (b) comprises a step of determining whether a node corresponding to the key parameter already exists in the hierarchical tree, wherein:
• (b1) if it is determined that the node corresponding to the key parameter already exists, then a new node corresponding to the key parameter is not added, and at least one node corresponding to a parameter which is not the key parameter is added to the hierarchical tree;
• and
• (b2) if it is determined that the node corresponding to the key parameter does not exist, then a new node corresponding to the key parameter and at least one node corresponding to a parameter which is not the key parameter are added to the hierarchical tree.