SQL Server确定统计边界
一些统计任务需要根据当前日期确定统计的边界:天或月
代码:
GO
-- DATEADD, DATEDIFF, Statistics, 日期范围
DECLARE @StatisticsDay DATETIME='2018-05-03'
DECLARE @StatisticsTodayStartTime DATETIME -- 要统计的日期上边界
DECLARE @StatisticsTodayEndTime DATETIME -- 要统计的日期下边界
DECLARE @StatisticsMonthStartTime DATETIME -- 要统计月份的上边界
DECLARE @StatisticsMonthEndTime DATETIME -- 要统计月份的下边界
SET @StatisticsTodayStartTime=@StatisticsDay
SET @StatisticsTodayEndTime=DATEADD(DD, 1, @StatisticsDay)
SET @StatisticsMonthStartTime=DATEADD(MM, DATEDIFF(MM, 0, @StatisticsDay), 0)
SET @StatisticsMonthEndTime=DATEADD(MM, DATEDIFF(MM, 0, @StatisticsDay) + 1, 0)
SELECT StatisticsDay=@StatisticsDay
SELECT
TodayStartTime=@StatisticsTodayStartTime,
TodayEndTime=@StatisticsTodayEndTime,
MonthStartTime=@StatisticsMonthStartTime,
MonthEndTime=@StatisticsMonthEndTime
GO
结果: