Вы можете использовать функцию ПЕРЕВОДА, как указано ниже:
Ref Query (SQL -Fiddle ):
create table employees(id int, last_name varchar(100));
insert into employees values(1, 'able');
SELECT TRANSLATE(last_name, 'aeiou', 'AEIOU') as last_name from employees;
Синтаксис
Синтаксис для функции TRANSLATE в Oracle / PL SQL:
TRANSLATE( string1, string_to_replace, replacement_string )
Параметры или аргументы
string1
The string to replace a sequence of characters with another set of characters.
string_to_replace
The string that will be searched for in string1.
replace_string
All characters in the string_to_replace will be replaced with the corresponding character in the replacement_string.