更新记录

• If the dataset contains constraints such as foreign keys or non - nullable constraints , it is possible that as you update a record after you have finished updating one column but before you get to the next one the record can temporarily be in an error state
  如果数据集包含约束（例如外键或不可为空的约束） ，那么当您更新记录时（在更新完一列之后，但在开始更新下一列之前） ，记录可能会暂时处于错误状态。