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Difference Between VARCHAR and NVARCHAR in SQL Server

When to Use What?

• Use VARCHAR when dealing with English or Latin-based languages (saves storage and improves performance).
• Use NVARCHAR when storing multilingual data (Unicode characters like Chinese, Arabic, etc.).

Feature	VARCHAR	NVARCHAR
Storage Type	Non-Unicode	Unicode (UTF-16)
Character Support	Only supports single-byte characters (e.g., English, Latin)	Supports multilingual characters (e.g., Chinese, Arabic, Hindi)
Storage Size	1 byte per character	2 bytes per character (due to Unicode)
Prefix for String Literals	No prefix needed	Prefix N before string (e.g., N'Text')
Max Length	VARCHAR(8000) or VARCHAR(MAX)	NVARCHAR(4000) or NVARCHAR(MAX)
Performance	Faster for English/Latin-based data (requires less storage)	Slightly slower due to Unicode support
Best Use Case	English, simple character sets	Multilingual applications, special characters