ALTER TABLE NGWL_TEST_SYSTEM.CONTRACT_MANAGE_DETAIL
    ADD (SERVICE_ITEMS_CODE VARCHAR(100),
         SERVICE_ITEMS_NAME VARCHAR(200));

COMMENT ON COLUMN NGWL_TEST_SYSTEM.CONTRACT_MANAGE_DETAIL.SERVICE_ITEMS_CODE IS '费用类别编码(服务项编码)';
  COMMENT ON COLUMN NGWL_TEST_SYSTEM.CONTRACT_MANAGE_DETAIL.SERVICE_ITEMS_NAME IS '费用类别名称(服务项名称)';