Rtrim Function

Trimming of trailing characters from a character string.
The rightmost characters that appear in the set are removed.

Syntax: RTRIM(CHAR,SET)
Example:

Use of RTRIM Function
SELECT 'BROWNINGyxXxy' String, RTRIM('BROWNINGyxXxy', 'xyX') Rtrim FROM DUAL;
SELECT  'BROWNING ' String,RTRIM('BROWNING ') Rtrim FROM DUAL --trimming space