How do you add a column to an existing table?
RESOLUTION 1: Run the ALTER sql command manually in the Editor to alter the table and add a column.
RESOLUTION 2: Use the Toad GUI to alter the table and add column.
There are many ways in Toad to make changes to a table. One way to do this is to access the Schema Browser | Table tab | right click on a table | Alter Table. This will bring up the Alter Table window and you can use the "Add Col" button to add a column to that table.