Since the column contains a "1" for every deviating record and "0" for non-deviating records, you need to add the values of the column.
对于每个偏差记录,这个列的值为“1”,对于非偏差列,这个列的值为“0”,因此,需要添加这个列的值。
The amount of each order is computed by summing the amount column of the associated details records.
每项订单的数量都通过加总相关详细信息记录的列计算得出。
If updates to the coordinate columns are possible, you may still be able to avoid bulk copies if the source table contains a time stamp column that records the time of last update for each row.
如果可能更新坐标列,但是源表包含一个时间戳列,其中记录了每行最后一次更新的时间,那么仍然可以避免批量复制。
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