Aggregation apparatus and aggregation method

A computer-implemented aggregation method comprising:

• identifying, in response to receiving an instruction for aggregation, one or more aggregation results related to the instruction from a plurality of aggregation results of a plurality of periods stored in the one or more memories;
• determining whether the identified one or more aggregation results include a first aggregation result aggregated by using first data at first timing before second timing of the receiving of the instruction, the first data being different from second data at the second timing;
• calculating a second aggregation result by using the first data when it is determined that the identified one or more aggregation results include the first aggregation result;
• and
• performing output for the instruction based on the calculated second aggregation result and one or more aggregation results other than the first aggregation result in the identified one or more aggregation results.

A non-transitory computer-readable medium storing instructions executable by one or more computers, the instructions comprising:

• one or more instructions for identifying, in response to receiving an instruction for aggregation, one or more aggregation results related to the instruction from a plurality of aggregation results of a plurality of periods stored in the one or more memories;
• one or more instructions for determining whether the identified one or more aggregation results include a first aggregation result aggregated by using first data at first timing before second timing of the receiving of the instruction, the first data being different from second data at the second timing;
• one or more instructions for calculating a second aggregation result by using the first data when it is determined that the identified one or more aggregation results include the first aggregation result;
• and
• one or more instructions for performing output for the instruction based on the calculated second aggregation result and one or more aggregation results other than the first aggregation result in the identified one or more aggregation results.