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Oracle9i SQL Reference
Release 2 (9.2)

Part Number A96540-02
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Text description of functions81.gif follows
Text description of unistr


UNISTR takes as its argument a string and returns it in the national character set.The national character set of the database can be either AL16UTF16 or UTF8. UNISTR provides support for Unicode string literals by letting you specify the Unicode encoding value of characters in the string. This is useful, for example, for inserting data into NCHAR columns.

The Unicode encoding value has the form '\xxxx' where 'xxxx' is the hexadecimal value of a character in UCS-2 encoding format. To include the backslash in the string itself, precede it with another backslash (\\).

For portability and data preservation, Oracle Corporation recommends that in the UNISTR string argument you specify only ASCII characters and the Unicode encoding values.

See Also:

Oracle9i Database Globalization Support Guide for information on Unicode and and national character sets


The following example passes both ASCII characters and Unicode encoding values to the UNISTR function, which returns the string in the national character set:

SELECT UNISTR('abc\00e5\00f1\00f6') FROM DUAL;