RTRIM
- This will trim off unwanted characters from the right sides of string.
- This will remove all the specific characters from right side of string.
Syntax: rtrim (string [, unwanted_chars])
Ex:
select rtrim('computer','er'), rtrim('computer','ter') from dual;
output
rtrim('computer','er')
-----------------------
comput
rtrim('computer','ter')
--------------------------
compu

some more example
select rtrim('tech ') from dual;
-----------------------------------
tech
select rtrim('tech ',' ') from dual;
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tech
select rtrim('123000','0') from dual;
--------------------------------------
123
select rtrim('123tech123','123') from dual;
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------
123tech
select rtrim('techxyxzyyy','xyz') from dual;
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------
tech
select rtrim('tech6372','0123456789') from dual;
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------
tech