The Rtrim function removes characters from the right-hand side of an expression.
Rtrim syntax
RTRIM( expression, [ trim_expression ] )
Rtrim example
select rtrim('example ') from dual;
Result: example
select rtrim('000function000', '0') from dual;
Result: 000function
select rtrim('PHP123', '123') from dual;
Result: PHP
select rtrim('123PHP123123', '123') from dual;
Result: 123PHP
select rtrim('TestxyzXYZ', 'XYZ') from dual;
Result: Testxyz
select rtrim('Testabcccbaabc', 'cba') from dual;
Result: Test
select rtrim('Java12345', '0123456789') from dual;
Result: Java