摘要：
set statistics profile on获取语句真实的执行计划信息set statistics profile on goselect distinct Productid,unitprice from salesorderdetail_test wher... 阅读全文
摘要：
set statistics io on--清空缓存数据dbcc dropcleanbuffersgo--清空缓存计划dbcc freeproccachegoset statistics io ongoselect distinct Productid,unitpri... 阅读全文