Import Sets key concepts Import Sets is a powerful tool used to import data from various data sources, and then map that data into ServiceNow tables. The Import Sets table acts as a staging area for records imported from a data source. Note: Data should not be imported in extremely large chunks. Creating an extremely large import set can cause delays and system outages. A transform map determines the relationships between fields displaying in an Import Set table and fields in an existing ServiceNow table, such as the Incidents or Users table. Importing sets will skip records when the data in the instance matches the data being imported. Note: Import Sets run as user System. Therefore, Import Sets cannot add data to encrypted fields. Import sets terminologyA dictionary of key Import Set terms.Supported import formatsYou can import data from several different file formats.Data sourcesData sources are used to create an import set so that data can be processed, if necessary, prior to being mapped onto a production table.Transform mapsA transform map is a set of field maps that determine the relationships between fields in an import set and fields in an existing ServiceNow table, such as Incident [incident] or User [sys_user].Updating records using coalesceThe coalesce option allows you to update existing target table records when transforming import data.Standard import set tablesSeveral Import Set tables are available by default..Import sets maximum row sizeRows imported using import sets must not exceed the maximum row size.