code: def drop_column(self, name):
          
          self._check_dropped()
          if name in list(self.table.columns.keys()):
              self.op.drop_column(self.table.name, name, schema=self.schema)
              self.table = self._update_table(self.table.name)
docs: Drop the column ``name``
          ::
  
              table.drop_column('created_at')