方法
In some cases, an ArcGIS Online hosted feature layer must be constantly updated with data from an external feature class to ensure the feature layer is always updated with the latest data. For example, in a continuous data collection project where the collected features and data are recorded continuously in the external feature class, the latest recorded data must be updated to the hosted feature layer in ArcGIS Online.
In ArcGIS Pro, the Append tool can be used to load new data from the external feature class to the existing hosted feature layer, provided the hosted feature layer and the external feature class have the same field schema and both contain a Global ID field. If the external feature class does not have the same field schema as the hosted feature layer, refer to ArcGIS Pro: Alter the schema of a database table for steps to edit the field schema.
The instructions provided describe how to update a hosted feature layer in ArcGIS Online with data from an external feature class in ArcGIS Pro.
The following figure shows some attributes of a hosted feature layer in ArcGIS Online that must be updated with new data from the external feature class. The existing hosted feature layer contains 64 point features, representing the distribution of schools within the area.

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button to refresh the map. The appended data are immediately updated in the feature layer. To view the updated data, open the hosted feature layer in ArcGIS Online, and click the Data tab in the feature layer item details page. Refer to ArcGIS Online: Work with attribute data for more information.The following figure shows the attributes of the hosted feature layer have been updated with data from the external feature class. The number of features in the hosted feature layer is updated to 78 features.

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