What's the difference between nchar and char?
CHAR uses one byte to store each character and NCHAR uses two bytes to store each character.
CHAR uses ASCII to represent its characters and is commonly used for English applications. ASCII also supports a very small set of non-Enlish characters. NCHAR uses UNICODE to represent its characters using two bytes each. UNICODE is commonly used to non-Enlish text.
Knowing this NCHAR takes twice as much storage space as CHAR on a per-letter basis. However if you need international characters NCHAR is probably your only choice.
nchar is unicode while char is not
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