Were you running with elevated privledges? You'll need it to do some things in SQL Server.

>I have been learning SQL 2008. After creating a few related tables, I added a few additional column to one of the tables. When I attempt to save the table structure I get an error telling me that the table can not be dropped and re-created.
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>1. Why when added a new column does SQL need to drop the original and re-create it?
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>2. If the constraint are the problem, why doesn't SQL drop the constraints and recreate them?