A database management apparatus is provided with a setting unit that receives a snapshot request and records information indicating an extraction range to a memory, an extraction unit that sequentially extracts records and records the extracted records to another area, a monitoring unit that records information indicating an extraction-completed area and an extraction-remaining area, an update unit that judges whether a record targeted by an update instruction for update by a subsequent transaction is in the extraction-completed area, updates the update target record in the extraction-completed area if in the extraction-completed area, and records a map of the update target record in the extraction-remaining area to an area outside the extraction range and updates the map if in the extraction-remaining area, and a restore unit that updates the update target record to be the same as the map, after extraction of the update target record is completed.