When importing data into ServiceNow via anImport Set, the system determines whether to update existing records or create new ones based on theCoalescefield setting.
If noCoalesce Fieldis defined,ServiceNow treats every imported row as a new record.
The import process doesnotcheck for existing records, meaning no records in the target table are updated.
This can result induplicate entriesif the imported data includes records that already exist in the target table.
ACoalesce Fieldis used tomatchincoming data to existing records.
If a matching record is found, it is updated instead of inserting a new one.
If no matching record is found, a new record is created.
Behavior When No Coalesce Field is Specified:How Coalescing Works:Incorrect Answers Explanation:A.All rows are rejected from the import, as coalesce field is required
This is incorrect because the import does not require a coalesce field to proceed. The system will still import all rows.C.Duplicate rows are rejected from the import
Without a coalesce field, duplicates arenotrejected. Instead, every row is inserted as a new record, even if it already exists in the target table.D.All rows are treated as new records, but errors will be flagged in the import log
Errors are only flagged in cases ofdata mismatches, validation failures, or incorrect mappings, not just because coalescing is missing.
ServiceNow Documentation→ "Importing Data - Coalescing Best Practices"
ServiceNow Import Set Documentation→ "Understanding Import Set Behavior Without Coalescing"
References from Certified System Administrator (CSA) Documentation:
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