Oracle PL/SQL/Conversion Functions/CONVERT
CONVERT() converts between two different character sets. The returned value"s data type is VARCHAR2.
Syntax: CONVERT(<character_expression>, <target_charset> [,<source_charset>])
SQL>
SQL>
SQL>
SQL> SELECT
2 CONVERT ("Ä", "US7ASCII") ascii_a
3 FROM dual;
A
-
Z