oracle查询语句的临时表不需要"AS"
SELECT except_time
FROM
  (SELECT MIN(except_time) as except_time,
    normal_order_no
  FROM KL_PRODPLAN_OPERATION_ORDER
  WHERE normal_order_no IN ('HL11070009','HL11080004')
  AND except_time       IS NOT NULL
  GROUP BY normal_order_no
  ) temp_table2 --这里，不需要用 AS temp_table2