SQL & PL/SQL

Hi,

I am using LTRIM function with = operator. For some LTRIM its giving correct resultIt's giving me some different results like below.

select LTRIM('GRAIN=HASH','GRAIN=')  AS RES from dual; 

RES

----

HASH

but for below I am getting some different results.

select LTRIM('GRAIN=NONE','GRAIN=') as RES from dual;

RES

---

ONE

select LTRIM('GRAIN=NANE','GRAIN=') as RES from dual;

R

-

E

select LTRIM('GRAIN=RAHUL','GRAIN=') as RES from dual;

RES

---

HUL

Please let me know why LTRIM behaves like this.Thanks