Difference between Varchar and Nvarchar

Varchar and nvarchar are varieties of information in SQL Server. The predominant between varchar and narchar is that narchar is used to store Unicode characters, while varchar is used to store non-Unicode characters. The data storage is 1 byte per character in varchar, while the information storage in nvarchar is 2 bytes per character. In the topic definition, varchar helps as much as 8000 characters while nvarchar helps as much as 4000 characters.

What is Varchar?

Varchar is an AQL Server information type that pertains to variable characters. Non-Unicode characters are saved using varchar. The memory allocation in varchar is according to the inserted characters. In the topic definition, varchar helps as much as 8000 characters.

What is Nvarchar?

Nvarchar is a SQL Server information type that pertains to variable characters. Unicode characters are saved by nvarchar. Multiple languages ​​are likely to be stored in the information base. If other languages ​​are used, nvarchar will take up twice the space to store an extended set of characters. In the archived definition, nvarchar helps as much as 4000 characters.

Key differences

1. Narchar is used to store Unicode characters, while varchar does not store Unicode characters.
2. Varchar is used to store non-Unicode characters, whereas nvarchar does not store non-Unicode characters.
3. Data storage 1 byte per character in varchar whereas in narchar the information storage is not just 1 byte per character.
4. The data storage in nvarchar is 2 bytes per character, whereas in the data storage varchar it is simply not 2 bytes per character.
5. In the topic definition, varchar helps as much as 8000 characters while nvarchar helps as much as 4000 characters.
6. The memory allocation in varchar is similar to the number of characters inserted plus two additional bytes for the offset, while in nvarchar the memory allocation is similar to twice the number of characters inserted plus with additional bytes for the offset.
7. If there could also be Unicode characters to store in a column or variable, then we use varchar while on the other side, if there is no Unicode to store in a column or variable, we use nvarchar.
8. In the variable declaration or column definition, if the valve n of the non-mandatory parameter is simply not specified, it is thought to be 1 for varchar and 2 for nvarchar.