Sql server T-Sql Datatime按年份分组以获取过多数据

对此查询的响应返回了2分钟

SELECT YEAR(T1.SP_CreateDate) AS DATEYEAR, COUNT(1) AS TOTALCOUNT 
FROM LP_SocialPost T1 WHERE T1.SP_BO_ID = 67
GROUP BY YEAR(T1.SP_CreateDate)


DATEYEAR    TOTALCOUNT
---------|-------------
2015        452036

LP_SocialPost表的总数据计数=2.8M

如何减少查询时间

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Thanx.

如果表上没有索引，请在表上创建一个

非聚集索引

您可以在包含
SP\u CreateDate
列的
SP\u BO\u ID
列上创建索引。此索引将帮助查询执行
索引搜索
，而不是表扫描

CREATE NONCLUSTERED INDEX indexname
  ON LP_SocialPost (SP_BO_ID)
  include (SP_CreateDate) 

也许。。。使用分析

取决于现有索引

SELECT YEAR(T1.SP_CreateDate) AS DATEYEAR, 
       COUNT(1) over (partition by Year(T1.SP_CreateDate)) AS TOTALCOUNT 
FROM LP_SocialPost T1 
WHERE T1.SP_BO_ID = 67

有关分析的更多信息
可能重复的