Abstract: A database processing method, executed by a computer, includes: acquiring a plurality of differential logs of a first column-format database, each of the plurality of differential logs indicating a change in the first column-format database with which a second column-format database is to synchronize, determining aggregated logs on the basis of the plurality of differential logs, each of the aggregated logs indicating an aggregated change in a record for a corresponding value of a primary key of the first column-format database, generating at least one change command on the basis of the aggregated logs, the one change command being a command for collectively changing one or more values included in a column of the second column-format database, and applying the at least one change command to the second column-format database.

Abstract: An anonymizing apparatus includes a processor configured to receive an instruction from a first apparatus, anonymize an anonymized part of a first data based on a type of an application program that causes the first apparatus to send the instruction, and transmit the anonymized first data to the first apparatus.

Abstract: An anonymizing apparatus includes a processor configured to receive an instruction from a first apparatus, anonymize an anonymized part of a first data based on a type of an application program that causes the first apparatus to send the instruction, and transmit the anonymized first data to the first apparatus.