cost formulas造句

• To accomplish this , the db2 optimizer applies query cost formulas that evaluate and weigh four factors for each potential access path : the cpu cost , the i o cost , statistical information in the db2 system catalog , and the actual sql statement
  要实现这个目标， db2优化器会应用查询成本公式，该公式对每条可能的存取路径的四个因素进行评估和权衡： cpu成本、 i / o成本、 db2系统目录中的统计信息和实际的sql语句。
• Then a total cost formula of treatment plant special for sewage treatment industry in shenzhen under bot , tot and commission management mode is proposed respectively , and the recommendation of the parameters determining and calculation method is brought forward
  提出bot 、 tot和委托运营三种运营模式下,深圳市污水处理企业污水处理总成本的计算公式,并给出了符合深圳特区污水处理生产实际的参数取值和计算方法。