The steps to import new data into ServiceNow from a spreadsheet are: Load Data, Create Transform Map, Run Transform. Load Data is the process of uploading the spreadsheet file and creating an Import Set table that contains the data to be imported. Create Transform Map is the process of defining how the fields from the Import Set table map to the fields of the target table in ServiceNow. Run Transform is the process of executing the Transform Map and copying the data from the Import Set table to the target table.
Reference: Import sets, Transform maps

In ServiceNow, when a table is extended from a parent table, it inherits all fields from the parent. These inherited fields are integral to the structure of the child table and maintain the relationship between the parent and child tables. As a result, inherited fields cannot be deleted from the child table.
Key Points:
* Inheritance Structure: The child table's structure is designed to include all fields from the parent table to preserve data integrity and ensure consistent behavior across the hierarchy.
* System Constraints: ServiceNow does not provide an option to remove inherited fields from the child table. Attempting to delete such fields would disrupt the inheritance model and potentially cause system inconsistencies.
* Alternative Approaches: While you cannot delete inherited fields, you can manage their visibility:
* Form Layout: Adjust the form layout to hide inherited fields that are not relevant to users interacting with the child table.
* Access Controls: Implement access controls to restrict visibility or edit permissions for specific fields based on user roles.

See list of triggers on right hand side of this webpage: https://docs.servicenow.com/en-US/bundle/tokyo-application-development/page/administer/flow-designer/reference/flow-triggers.html The trigger types in Flow Designer are Application, Record, Schedule, and Topic. Outbound Email is not a trigger type, but an action type that can be used in a flow to send an email message1. References: Flow Designer Trigger Types