You cannot issue an ALTER TABLE DROP statement that would
drop every column from the table. At least one column must remain
in the table.
You cannot drop a column that is part of the fragmentation
key of a fragmentation strategy.
A column that is protected by a security label can be
dropped by the ALTER TABLE DROP statement, but the user must be DBSECADM
and must also hold the usual CONNECT, RESOURCE, and ALTER access privileges
for modifying the schema of the table.