Hi @JackEom.
Depending on what you're doing with the result, you might be able to change the column header name while maintaining the actual name in the backend. For example, if using a grid widget, the configuration area of the widget will allow you to specify a new column name for display.
If you can provide more details on where you're using the results from the service, we may be able to provide other recommendations.
Regards.
--Sharon
