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      on database
      for Create_Table  --|| Drop_Table
      as
         raiserror('Äã²»ÄÜ´´½¨±í',16,1)
            rollback      --¿ÉÒÔ½øÐлعöÒòΪCreate_table ÊÇÒþʽÊÂÎñ
                     
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