统计信息

• This updates statistics only when they are required
  此语句仅在需要时更新统计信息。
• A . viewing statistics on optimizer execution
  A .查看有关优化器执行的统计信息
• Engines statistics usd 980 year parts components statistics
  摩托车统计信息1500元年
• Only lists statistics not associated with an index
  则只列出与索引不关联的统计信息。
• Viewing asynchronous update statistics properties
  查看异步更新统计信息属性
• To obtain information about statistics , query the
  若要获得有关统计信息的信息，请查询
• Manually created statistics are not dropped
  手动创建的统计信息不会删除。
• When off , the information is not displayed
  如果为off ，则不显示统计信息。
• Name of optimizer statistics event . occurrence
  优化器统计信息事件的名称。
• On improving the quality of statistical information
  浅议统计信息质量提高