How to Add New Column to Existing Flat File in SSISPosted: September 9, 2013
When you have a need to add new column to your existing text file through your SSIS package, here is how:
Open the Flat File Connection Manager and click Advanced tab >> click New and give a name on the right panel
and it will refresh left list. You can make changes to data type property from the right panel.
If you want to add new column to the middle of the column, you need to click on the double-arrow next to New to choose insertion position.