While the history data of DB2 PE is only retained for a short time (hours or days), once data is in the PWH, the data is available for reporting and trend analysis over much longer periods.

At the same time, the timeframe in which these changes needed to be made was short, with a trend of becoming shorter and shorter over time.

At that time, real estate stocks were collectively at the stage of collection and short sale, thereby resulting in a downward trend.