|Oracle9i SQL Reference
Release 2 (9.2)
Part Number A96540-02
ASCIISTR takes as its argument a string in any character set and returns an ASCII string in the database character set. The value returned contains only characters that appear in SQL, plus the forward slash (/). Non-ASCII characters are converted to their Unicode (UTF-16) binary code value.
Oracle9i Database Globalization Support Guide for information on Unicode character sets and character semantics
The following example returns the ASCII string equivalent of the text string "