Ltrim
Use the Ltrim expression type to trim leading characters from a string (on the left side).
Use parameters that follow this form: ltrim(Dimension,"0")
where you
specify both the dimension and the character to trim. For example, to trim all
leading "0" characters when the source is "000123", specify:
ltrim(Dimension, "0")
as the expression. In this example,
the result is: 123.