The question refer to nvarchar(30) and not nchar(30)

So:

declare @a nvarchar(30)

set @a='aa'

select datalength(@a)

The answer is 4

declare @a nchar(30)

set @a='aa'

select...

Download that text field in a local file, let say mycode.sql.

Call isql for example to execute mycode.sql.

Example:

isql /i D:\APP_CODE\control\mycode.sql /Server /Usa /P >  "D:\APP_CODE\control\mycodelog.txt"

George