SQL Server 获取指定某一天的0点和23点59分59秒

1.获取前一天的 0点 和 23点59分59秒

 DECLARE @startDate DATE,
		 @startDateTime DATETIME,
		 @endDate DATETIME
SET @startDate = GETDATE()
SELECT @startDateTime = DATEADD(DAY,-1,@startDate);

SET @endDate=DATEADD(second,-1,CONVERT(DATETIME, dateadd(dd,1,@startDateTime)))
SELECT @startDate startDate,@endDate endDate

startDate | endDate
2019-08-20 | 2019-08-19 23:59:59.000

2.获取当前的 0点 和 23点59分59秒

DECLARE @startDate DATE,
	    @startDateTime DATETIME,
		@endDate DATETIME
    SET @startDate = GETDATE()
    SELECT @startDateTime = DATEADD(DAY,-1,@startDate);
    
    SET @endDate=DATEADD(second,-1,CONVERT(DATETIME, dateadd(dd,1,@startDate)))
    SELECT @startDate startDate,@endDate endDate

startDate | endDate
2019-08-20 | 2019-08-20 23:59:59.000