Well, there you have it 🙂 Your problem is not related directly to NiFi and it is caused by the executed SQL statement. I am not very experienced with SQL Servers but you could try selecting all the fields from the table and see if you still encounter an error message. If the error still persists, you could use the convert function on the where clause --> CONVERT(datetime,your_value,25) or select convert(varchar, your_value, 25) ... View more