I have a data in excel which has more that 400,000 records. A particular field in the data is a alphanumeric field where first few thousand fields are numeric and then there is a mix bag of numeric and alphanumeric data. When inputting the file in Alteryx it is automatically detecting the field as numeric and even after using Select tool and changing the data type to String is not working. All the numeric values are converting to string and displaying in output, however all the text data (alphanumeric data) are returning Null in the output.