What is the difference between varchar and nvarchar?

What is the difference between varchar and nvarchar?

sql-server varchar nvarchar

sql-server

What is the difference between char, nchar, varchar, and nvarchar in SQL Server?

sql-server varchar

sql-server

SQL Server Text type vs. varchar data type [closed]

sql-server text varchar sqldatatypes

sql-server

What are the main performance differences between varchar and nvarchar SQL Server data types?

sql-server sql-server-2005 storage varchar nvarchar

sql-server

Changing the maximum length of a varchar column?

sql sql-server sql-server-2008 tsql varchar

sql-server

Using varchar(MAX) vs TEXT on SQL Server

sql-server performance text varchar sql-types

sql-server

When increasing the size of VARCHAR column on a large table could there be any problems?

sql-server sql-server-2008 varchar alter-column

sql-server

SQL Server Convert Varchar to Datetime

sql sql-server datetime formatting varchar

sql-server

Are there disadvantages to using VARCHAR(MAX) in a table?

sql-server varchar nvarchar

sql-server

Does column ordering affects performance in Microsoft SQL Server 2012?

mysql sql-server database database-design varchar

sql-server

Determine varchar content in nvarchar columns

sql sql-server tsql varchar nvarchar

sql-server