Question

Ok, So I have these two tables –

BioUser- UserId,Weight,DateAdded
DimDate-Date // It has basically all the dates for any period..its basically a table with all dates till 2050

Now the BioUser table has entries for weight of a user but not for everyday but whenever they enter their weight. So I want to basically build a list of values for date and weight for all those missing dates in the BioUser. To explain myself better here is an example –

BioUser –

UserId Weight  DateAdded
 1      178    10/12/2009
 1      175    10/18/2009
 1      172    10/27/2009

So when I am trying to build a list between two dates say 10/12/2009 to 10/30/2009. It should display a list like –

Weight Date

178  10/12/2009
178  10/13/2009
178  10/14/2009
178  10/15/2009
178  10/16/2009
178  10/17/2009
175  10/18/2009
175  10/19/2009
175  10/20/2009
175  10/21/2009
175  10/22/2009
175  10/23/2009
175  10/24/2009
175  10/25/2009
175  10/26/2009
172  10/27/2009
172  10/28/2009
172  10/29/2009
172  10/30/2009

I have query something like this –

Select Weight,DateAdded from BioUser join Dimdate on BioUser.DateAdded=Dimdate.Date

But the above does not work somehow I want to get the most recent entry on weight from BioUser and only one entry also as the BioUser table can have multiple entries for a day.Can anyone please help me out ..

Answer 1

Thanks to everyone for their answers this is how I did it –

SELECT    
        (SELECT TOP (1) Weight
         FROM BioUser AS b
         WHERE (CAST(DateTested AS Date) <= k.Date) AND (UserId= @UserId)
         ORDER BY DateTested DESC) AS Weight, Date AS DateTested
FROM     DimDate AS k
WHERE     (Date BETWEEN @StartDate AND @EndDate)