> For the complete documentation index, see [llms.txt](https://help.dataimporter.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.dataimporter.io/formatting/replace-null-values.md).

# Replace Null Values

By default, when updating existing Salesforce records, where the data is populated in Salesforce e.g. email, and the source data has a blank value, Salesforce will simply ignore the update. By selecting this option, the Blank values will be accepted by Salesforce, and the field data will be deleted.

<figure><img src="https://2845823711-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FtvRVifvxmkDBmPKpGlr2%2Fuploads%2FJnDJJhjklkqDg6zdb0ZJ%2FUntitled.png?alt=media&amp;token=b9cc9ab3-82ce-47b8-a6fe-c9982927af44" alt=""><figcaption></figcaption></figure>

This is only available for Upsert and Update operations.