Change datatype varchar to nvarchar in existing SQL Server 2005 database. Any issues?

Question

I need to change column datatypes in a database table from varchar to nvarchar in order to support Chinese characters (currently, the varchar

Answer 1

You can do on non primary key fields:

ALTER TABLE [TableName]
ALTER COLUMN [ColumnName] nvarchar(N) null

On the primary key fields it will not work - you will have to recreate the table