Ltrim Function

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

Syntax: LTRIM(CHAR,SET)
Example:

Use of LTRIM Function
SELECT 'xyzXxyORACLE' OrgStr,LTRIM('xyzXxyORACLE', 'xzyX') Ltrim FROM DUAL;
SELECT LTRIM(' Oracle') FROM DUAL;  --trimming space