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。
2
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。
3
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.