DIFFERENCE BETWEEN VARCHAR AND NVARCHAR IN SQL SERVER

 VARCHAR: The VARCHAR is most widely used into the sql server to store non-unicode variable length type of data or string data. 

VARCHAR stores data at 1 byte per character and it can store non-unicode characters or string data. 

VARCHAR supports upto 8000 characters.

VARCHAR is a variable length and it takes less memory space. 

The use of VARCHAR in sql server is as follows:

DECLARE @NAME VARCHAR(50)

SET @NAME = 'RAMAN SACHDEVA'

SELECT @NAME AS NAME

SELECT DATALENGTH(@NAME) AS NAME_DATALENGTH 

After execution of above scripts, the result would be:

NAME: RAMAN SACHDEVA

DATALENGTH: 14

NVARCHAR: The NVARCHAR is most widely used into the sql server to store unicode variable length type of data or string data. 

NVARCHAR stores data at 2 byte per character and it can store unicode characters or string data. 

NVARCHAR supports upto 4000 characters.

The use of NVARCHAR in sql server is as follows:

DECLARE @NAME1 NVARCHAR(50)

SET @NAME1 = 'PALKA SACHDEVA'

SELECT @NAME1 AS NAME

SELECT DATALENGTH(@NAME1) AS NAME1_DATALENGTH

After execution of above scripts, the result would be:

NAME: PALKA SACHDEVA

DATALENGTH: 28

You can see the below screenshots for further clarification:

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