I need max date and max time

I need this SP to return the 102.8 and not the 106.2


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IF EXISTS (SELECT * FROM SYSOBJECTS WHERE ID = OBJECT_ID(N'[dbo].[usp_Get_PreviousGasWeight]') AND OBJECTPROPERTY(id, N'IsProcedure') = 1)
DROP PROCEDURE [dbo].[usp_Get_PreviousGasWeight];
GO

CREATE PROC [dbo].[usp_Get_PreviousGasWeight] 
		@ContainerID int,
		@CompanyID int
AS 
BEGIN
	SELECT [GasWeight] 
	FROM [dbo].[WeighingEvents]
	WHERE [ContainerID] = @ContainerID AND [CompanyID] = @CompanyID AND [Active] = 1
	ORDER BY [DateStamp] DESC
				
END
GO

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CAMPzxzxDeathzxzxAsked:
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Scott PletcherSenior DBACommented:
Verify the contents of these columns in the table:
[ContainerID]
[CompanyID]
[Active]

There must be something preventing the row you want and expect from being considered by the query.  Not active?!
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PortletPaulEE Topic AdvisorCommented:
You have ORDER BY [DateStamp] DESC so 2017-03-08 11:40 (102.8) is later than 2017-03-08 10:00 (106.2)

You also seem to only want one value... but the query isn't limited to one row. Do you need MAX() perhaps?

      SELECT MAX( [GasWeight] )
      FROM [dbo].[WeighingEvents]
      WHERE [ContainerID] = @ContainerID AND [CompanyID] = @CompanyID AND [Active] = 1
      /* ORDER BY [DateStamp] DESC */
0
PortletPaulEE Topic AdvisorCommented:
While I'm not sure what you really want, perhaps this will help:
SELECT
      *
FROM (
      SELECT
            *
          , ROW_NUMBER() OVER (ORDER BY [DateStamp] DESC) AS rn
      FROM [dbo].[WeighingEvents]
      WHERE [ContainerID] = @ContainerID
      AND [CompanyID] = @CompanyID
      AND [Active] = 1) AS d
WHERE rn = 1

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CAMPzxzxDeathzxzxAuthor Commented:
Thanks
0
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