SQL Server - append text field with rotation

Question

Let's say I have nvarchar(300) column.

I append the text as follows:

update tablename set fieldname = fieldname + 'appended string'

How can I tell SQL Server to automatically trim the text from beginning to ensure it never exceeds the maximum column length?

Answer 1

You could use the RIGHT function for that:

update tablename set fieldname = RIGHT(fieldname + N'appended string', 300)