While you can report on Notes using the "File and Content Report" report type, there are some considerations that do not apply to other types of reports.
These considerations affect the data returned on the report as well as the available fields that can be used in the report.
Important considerations for "Notes" reports:
Report Data and Sharing Considerations
Report Field Considerations
Including any of the following columns will cause the report to return no results:
If the "File Version" column is included in the report, a row will appear for each version of the Note, though only data from the most recent version of the Note will be reflected in any of the other columns.
Vote and Comment on the ability to Report on Notes and Attachments in the Salesforce Ideas Exchange
Vote and Comment on the ability for New Notes: Increase Reporting Capability, which includes providing a report that has some lines of text from the body of the note.
File and Content Reports - Salesforce Help
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