Ошибка отсутствия часа с функцией Lag analytique

Question

Мне нужно найти отсутствующий час в моем столе, для частоты = 1 Мне нужно найти запись в час, если это не так, я должен отобразить отсутствующий час. вот мой код

declare @StartDate datetime declare @EndDate datetime declare @now datetime set @now = getdate() set @StartDate = dateadd(day,-30,@now) set @EndDate = dateadd(day,-2,@now) Select Flow.Id,Flow.ComponentId, Frequency.Name frequencyName, Flow.MeasurementDate as MeasurementDate, LAG(MeasurementDate) OVER (ORDER BY MeasurementDate) LagValue, abs( DATEDIFF (hour, MeasurementDate, LAG(MeasurementDate) OVER (ORDER BY MeasurementDate))) DifferenceDate , (CASE WHEN DATEDIFF (hour, MeasurementDate, LAG(MeasurementDate) OVER (ORDER BY MeasurementDate)) > '1' THEN 'Yes' ELSE 'No' END) AS Gap into #tab1 FROM Data.dbo.Flow inner join Data.dbo.Component on flow.ComponentId = Component.Id inner join Data.dbo.Frequency on Flow.Frequency = Frequency.Id Where flow.LoaderCode='TOT' and Flow.Frequency='1' and ScheduledVolume IS NOT NULL and MeasurementDate between @StartDate and @EndDate --and DATEDIFF (hour, MeasurementDate, LAG(MeasurementDate) OVER (ORDER BY MeasurementDate)) >1 Group By Frequency.Name, Flow.MeasurementDate, Flow.ComponentId select * from #tab1 

Answer 1

--if i right understood then try this 

    DECLARE @StartDate DATETIME 
DECLARE @EndDate DATETIME 
DECLARE @now DATETIME 
IF OBJECT_ID('Tempdb..#tab1') IS NOT NULL 
    BEGIN 
     DROP TABLE #tab1 
    END 

SET @now = GETDATE() 
SET @StartDate = GETDATE() - 30 
SET @EndDate = GETDATE() - 2 


SELECT Flow.Id , 
     Flow.ComponentId , 
     Frequency.Name AS frequencyName , 
     CONVERT(DATE, Flow.MeasurementDate) AS [Measurement Date] , 
     DATEPART(HOUR, Flow.MeasurementDate) AS [Measurement Hour] , 
     COALESCE(LAG(DATEPART(HOUR, Flow.MeasurementDate)) OVER (PARTITION BY CONVERT(DATE, MeasurementDate) ORDER BY DATEPART(HOUR, 
                   MeasurementDate)), 
       0) AS [Measurement Previous Hour] 
INTO #tab1 
FROM Data.dbo.Flow 
     INNER JOIN Data.dbo.Component ON Flow.ComponentId = Component.Id 
     INNER JOIN Data.dbo.Frequency ON Flow.Frequency = Frequency.Id 
WHERE Flow.LoaderCode = 'TOT' 
     AND Flow.Frequency = '1' 
     AND ScheduledVolume IS NOT NULL 
     AND CONVERT(DATE, MeasurementDate) BETWEEN CONVERT(DATE, @StartDate) 
              AND  CONVERT(DATE, @EndDate) 

SELECT T.* , 
     CASE WHEN (T.[Measurement Hour] - T.[Measurement Previous Hour]) > 1 
      THEN (T.[Measurement Hour] - T.[Measurement Previous Hour] - 1) 
      ELSE 0 
     END AS [Missing Hours] 
FROM #tab1a AS T 
WHERE (T.[Measurement Hour] - T.[Measurement Previous Hour]) > 1