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Help witha query

Hello,

I have a function that returns a table.  It wokrs ok but now the users want the column names to include a prefix/postfix based on the parameter @Month.

So if i was to call the function like ReadControlMeasurement( 22, 3)

then each column name in the returned table should be prefixed or postfixed with a 3.  Such as:

 msr_id-3
 kli_Kliniknr-3
 pat_id-3
 

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The function gets called many times for different months and they need some help idenitifying the columns in the different tablesets returned.

Is there any way to do this? Can i use dynamic sql here?


ALTER FUNCTION [dbo].[ReadControlMeasurement]
(
	-- Add the parameters for the function here
	@pat_id int,
	@TheMonth int
)


RETURNS TABLE as
  return
  (

    SELECT  [msr_id]
      ,M.[kli_Kliniknr]
      ,M.[pat_id]
      ,convert( date, [msr_Date]) as msr_Date 
      ,[msr_Q1Frequency]
      ,[msr_Q1Severity]
      ,[msr_Q1Total]
      ,[msr_Q2Frequency]
      ,[msr_Q2Severity]
      ,[msr_Q2Total]
      ,[msr_Q3Frequency]
      ,[msr_Q3Severity]
      ,[msr_Q3Total]
      ,[msr_Q4Frequency]
      ,[msr_Q4Severity]
      ,[msr_Q4Total]
      ,[msr_Q5Frequency]
      ,[msr_Q5Severity]
      ,[msr_Q5Total]
      ,[msr_Q6Frequency]
      ,[msr_Q6Severity]
      ,[msr_Q6Total]
      ,[msr_Q7Frequency]
      ,[msr_Q7Severity]
      ,[msr_Q7Total]
      ,[msr_Q8Frequency]
      ,[msr_Q8Severity]
      ,[msr_Q8Total]
      ,[msr_Q9Frequency]
      ,[msr_Q9Severity]
      ,[msr_Q9Total]
      ,[msr_Q10Frequency]
      ,[msr_Q10Severity]
      ,[msr_Q10Total]
      ,[msr_Q11Frequency]
      ,[msr_Q11Severity]
      ,[msr_Q11Total]
      ,[msr_Q12Severity]
      ,[msr_Q12Frequency]
      ,[msr_Q12Total]
      ,[msr_Total]
      ,[msr_Pain]

      ,(select case when max(pm.med_id) is not null then 'Ja' else '' end as [Analgetikabehandling] from [PatientMedicines] PM 
          inner join Medicines Med on PM.med_id = med.med_id 
          inner join MedicineGroups MG on med.mgp_id = MG.mgp_id 
          and (MG.mgp_ATCCode = 'N 02') 
		where PM.pat_id = M.pat_id) as  [Analgetikabehandling]

      ,case when [msr_Activation] is not null then 'Ja' else '' end as [msr_Activation]
      ,case when [msr_PhysicalActivity] is not null then 'Ja' else '' end as [msr_PhysicalActivity]
      ,case when [msr_CalmEnvironment] is not null then 'Ja' else '' end as [msr_CalmEnvironment]
      ,case when [msr_Massage] is not null then 'Ja' else '' end as [msr_Massage]
      ,case when [msr_Music] is not null then 'Ja' else '' end as [msr_Music]
      ,case when [msr_Outdoors] is not null then 'Ja' else '' end as [msr_Outdoors]
      ,case when [msr_ExtraSupportMeals] is not null then 'Ja' else '' end as [msr_ExtraSupportMeals]
      ,case when [msr_ExtraSupportAnxiety] is not null then 'Ja' else '' end as [msr_ExtraSupportAnxiety]
      ,case when [msr_ExtraSupportOther] is not null then 'Ja' else '' end as [msr_ExtraSupportOther]
      ,case when [msr_OtherActivity] is not null then 'Ja' else '' end as [msr_OtherActivity]
	   ,mc.*
      ,[msr_Approved]
      ,[msr_ApprovedDate]
  
  FROM [Measurements] M outer apply dbo.ReadPatientMedicineCounts( m.pat_id, m.msr_date ) mc
  where msr_id = dbo.GetControlMeasurement_msr_id( @pat_id, @TheMonth )  
  and msr_Approved = 'Y'
  )

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0
soozh
Asked:
soozh
2 Solutions
 
Shaun KlineLead Software EngineerCommented:
Instead of modifying the column names, maybe just return the provided value as another column in your results?
0
 
Jim HornMicrosoft SQL Server Developer, Architect, and AuthorCommented:
Agreed.  

Dynamic set names is generally a bad idea as any downstream process may not necessarily be able to handle changed names.  SSRS, like SSIS, requires a 'contract' between data source and destination, and changing column names would break that contract every time (unless you're using SSRS matrixes).

Maybe  contain in the set for all columns, or column names like current_month, current_month_minus_one, current_month_minus_two, etc.?
0

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