RTRIM function

RTRIM removes a set of characters from the right of a string. RTRIM stands for "right trim". The general format for this function is:

RTRIM(string[, characters_to_remove])

By default the RTRIM removes the spaces:


SQL> SELECT RTRIM('days           ') FROM dual;

RTRI
----
days

SQL>

Remove a letter:


SQL> SELECT RTRIM('days', 's') FROM dual;

RTR
---
day

SQL>

CREATE TABLE EMP (EMPNO NUMBER(4) NOT NULL,
                  ENAME VARCHAR2(10),
                  JOB VARCHAR2(9),
                  SAL NUMBER(7, 2),
                  DEPTNO NUMBER(2));

INSERT INTO EMP VALUES (1, 'SMITH', 'CLERK',     800,    20);
INSERT INTO EMP VALUES (2, 'ALLEN', 'SALESMAN', 1600,    30);
INSERT INTO EMP VALUES (3, 'WARD',  'SALESMAN', 1250,    30);
INSERT INTO EMP VALUES (4, 'JONES', 'MANAGER',  2975,    20);
INSERT INTO EMP VALUES (5, 'MARTIN','SALESMAN', 1250,    30);
INSERT INTO EMP VALUES (6, 'BLAKE', 'MANAGER',  2850,    30);
INSERT INTO EMP VALUES (7, 'CLARK', 'MANAGER',  2850,    10);
INSERT INTO EMP VALUES (8, 'SCOTT', 'ANALYST',  3000,    20);
INSERT INTO EMP VALUES (9, 'KING',  'PRESIDENT',3000,    10);
INSERT INTO EMP VALUES (10,'TURNER','SALESMAN', 1500,    30);
INSERT INTO EMP VALUES (11,'ADAMS', 'CLERK',    1500,    20);

SQL> select ename, rtrim(ename,'N') from emp;

ENAME      RTRIM(ENAM
---------- ----------
SMITH      SMITH
ALLEN      ALLE
WARD       WARD
JONES      JONES
MARTIN     MARTI
BLAKE      BLAKE
CLARK      CLARK
SCOTT      SCOTT
KING       KING
TURNER     TURNER
ADAMS      ADAMS

11 rows selected.

SQL>
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