I have a polygon shapefile that is loaded with old demographic data in its attribute file, I just received the new data today in xls format. What I want to do is just delete the old demo data from the existing shapefile by selecting the fields in the attribute table and right clicking delete. Then I would do a simple join using the ID numbers for each feature to add the new data from the new table then just export it out as a new shapefile. The problem is that for some reason I can not delete entire columns from the attribute table.
How would you go about stripping the data from this polygon shapefile?