When Toad users save the results of a TOAD query to Excel, the leading zeroes for varchar fields are truncated when viewed in the Excel spreadsheet. The leading zeroes appear in TOAD's formatted script output pane.
1) Go to View | Options | Data Grids | Data
2) Uncheck the "Trim string data in CHAR and NCHAR columns" option
3) Click "Apply" and "OK" to accept the changes