From: sangeetha priya on
What is tha difference between varchar and nvarchar?

From http://www.developmentnow.com/g/113_2005_8_1_0_0/sql-server-programmi

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From: Eric Isaacs on
VARCHAR is 1 byte per character, whereas NVARCHAR is unicode, which
has 2 bytes per character.

http://www.microsoft.com/communities/newsgroups/en-us/default.aspx?dg=microsoft.public.sqlserver.programming&tid=a6afa39e-a491-44f2-9eb6-a9f7e526339d&cat=&lang=&cr=&sloc=&p=1

-Eric Isaacs