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

• nchar and nvarchar can store Unicode characters.
• char and varchar cannot store Unicode characters.
• char and nchar are fixed-length which will reserve storage space for number of characters you specify even if you don't use up all that space.
• varchar and nvarchar are variable-length which will only use up spaces for the characters you store. It will not reserve storage like char or nchar.
• char: fixed-length character data with a maximum length of 8000 characters.
• nchar: fixed-length unicode data with a maximum length of 4000 characters.
• Char = 8 bit length
• NChar = 16 bit length

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