What Are the Differences between CHAR and NCHAR

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What Are the Differences between CHAR and NCHAR? - Oracle DBA FAQ - Understanding SQL Basics

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A

Both CHAR and NCHAR are fixed length character data types. But they have the following differences:

CHAR's size is specified in bytes by default.
NCHAR's size is specified in characters by default. A character could be 1 byte to 4 bytes long depending on the character set used.
NCHAR stores characters in Unicode.

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