我有这些查询:我可以信任执行计划吗?
With CTE(comno) as
(select distinct comno=ErpEnterpriseId from company)
select id=Row_number() over(order by comno),comno from cte
select comno=ErpEnterpriseId,RowNo=Row_number() over (order by erpEnterpriseId) from company group by ErpEnterpriseId
SELECT erpEnterpriseId, ROW_NUMBER() OVER(ORDER BY erpEnterpriseId) AS RowNo
FROM
(
SELECT DISTINCT erpEnterpriseId
FROM Company
) x
三个人都返回相同的成本和实际执行plans..why和怎么做的?
Hi Otavio, 我要求的答案不是概率.. – TonyP 2010-02-13 14:37:09
这是我的答案,我坚持它。 – 2010-02-13 14:39:37