LTRIM scans a text expression from left to right and removes all the characters that match the characters in the trim expression, until it finds an unmatched character.
VARCHAR2 | CLOB
LTRIM(char [, set ])
char is the text expression to be trimmed.
set is a text expression with the characters to remove. The default value of set is a single blank.
LTRIM(' . . . .Last Word', ' .') returns the value Last Word.
LTRIM('0001007061985', '01') returns the value 7061985.
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