SSIS How to get part of a string by separator

Question

I need an SSIS expression to get the left part of a string before the separator, and then put the new string in a new column. I checked in derived column, it seems no such e

Answer 1

You can specify the length to copy in the SUBSTRING function and check for the location of the dash using CHARINDEX

SELECT SUBSTRING(@sString, 1, CHARINDEX('-',@sString) - 1)

For the SSIS expression it is pretty much the same code:

SUBSTRING(@[User::String], 1, FINDSTRING(@[User::String], "-", 1)-1)