CHR converts an integer to the character with its binary equivalent in either the database character set or the national character set.
For single-byte character sets, if
n > 256, then
CHR converts the binary equivalent of
For the Unicode national character sets and all multibyte character sets,
n must resolve to one entire code point. Code points are not validated, and the result of specifying invalid code points is indeterminate.
VARCHAR2 | NVARCHAR2
CHR(n [ USING NCHAR_CS ])
n is a numeric expression.
USING NCHAR_CS returns a character in the national character set. Otherwise, the return value is in the database character set. The OLAP engine uses the UTF8 national character set, so the return value may be different from the SQL
CHR function, which uses the database UTF16 national character set.
CHR(67 USING NCHAR_CS), and
CHR(323) all return the letter
C on an ASCII-based system with the WE8DEC database character set and the UTF8 national character set.
CHR(323) is evaluated as