| Oracle® Database SQL Reference 10g Release 1 (10.1) Part Number B10759-01 |
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LTRIM removes from the left end of char all of the characters contained in set. If you do not specify set, it defaults to a single blank. If char is a character literal, then you must enclose it in single quotes. Oracle Database begins scanning char from its first character and removes all characters that appear in set until reaching a character not in set and then returns the result.
Both char and set can be any of the datatypes CHAR, VARCHAR2, NCHAR, NVARCHAR2, CLOB, or NCLOB. The string returned is of VARCHAR2 datatype and is in the same character set as char.
The following example trims all of the left-most x's and y's from a string:
SELECT LTRIM('xyxXxyLAST WORD','xy') "LTRIM example"
FROM DUAL;
LTRIM example
------------
XxyLAST WORD