sql server中的條件選擇

Question

我想在參數值上有條件地選擇列。如果@TypePerf = 0，則選擇列，B，C，如果@TypePerf = 1，則選擇列A，C ...等 我想有一個排序：

if (@typePerf = 1 or @typePerf = 0) then 
select ... 

-- 0,1 Begin 
     (vlbench1.Price-isnull(vlbench1D.Price,vlbenchFirstDispo.Price))/isnull(vlbench1D.Price,vlbenchFirstDispo.Price) as VLPerf1Day, 
     (vlbench1.Price-isnull(vlbenchWTD.Price,vlbenchFirstDispo.Price))/isnull(vlbenchWTD.Price,vlbenchFirstDispo.Price) as VLPerfWTD, 
     (vlbench1.Price-isnull(vlbenchMTD.Price,vlbenchFirstDispo.Price))/isnull(vlbenchMTD.Price,vlbenchFirstDispo.Price) as VLPerfMTD, 
     (vlbench1.Price-isnull(vlbenchQTD.Price,vlbenchFirstDispo.Price))/isnull(vlbenchQTD.Price,vlbenchFirstDispo.Price) as VLPerfQTD, 
     (vlbench1.Price-isnull(vlbenchYTD.Price,vlbenchFirstDispo.Price))/isnull(vlbenchYTD.Price,vlbenchFirstDispo.Price) as VLPerfYTOD, 
     (vlbench1.bench-isnull(vlbench1D.bench,vlbenchFirstDispo.bench))/isnull(vlbench1D.bench,vlbenchFirstDispo.bench) as BenchPerf1Day, 
     (vlbench1.bench-isnull(vlbenchWTD.bench,vlbenchFirstDispo.bench))/isnull(vlbenchWTD.bench,vlbenchFirstDispo.bench) as BenchPerfWTD, 
     (vlbench1.bench-isnull(vlbenchMTD.bench,vlbenchFirstDispo.bench))/isnull(vlbenchMTD.bench,vlbenchFirstDispo.bench) as BenchPerfMTD, 
     (vlbench1.bench-isnull(vlbenchQTD.bench,vlbenchFirstDispo.bench))/isnull(vlbenchQTD.bench,vlbenchFirstDispo.bench) as BenchPerfQTD, 
     (vlbench1.bench-isnull(vlbenchYTD.bench,vlbenchFirstDispo.bench))/isnull(vlbenchYTD.bench,vlbenchFirstDispo.bench) as BenchPerfYTOD, 
     -- 0,1 End 
if (if (@typePerf = 2 or @typePerf = 0) then 

select ...  
      -- 0,2 Begin 
      (vlbench1.Price-isnull(vlbench1D.Price,vlbenchFirstDispo.Price))/isnull(vlbench1D.Price,vlbenchFirstDispo.Price) - (vlbench1.bench-isnull(vlbench1D.bench,vlbenchFirstDispo.bench))/isnull(vlbench1D.bench,vlbenchFirstDispo.bench) as RelativePerf1D, 
      (vlbench1.Price-isnull(vlbenchYTD.Price,vlbenchFirstDispo.Price))/isnull(vlbenchYTD.Price,vlbenchFirstDispo.Price) - (vlbench1.bench-isnull(vlbenchYTD.bench,vlbenchFirstDispo.bench))/isnull(vlbenchYTD.bench,vlbenchFirstDispo.bench) as RelativePefYTOD, 
      (vlbench1.Price-isnull(vlbenchMTD.Price,vlbenchFirstDispo.Price))/isnull(vlbenchMTD.Price,vlbenchFirstDispo.Price) - (vlbench1.bench-isnull(vlbenchMTD.bench,vlbenchFirstDispo.bench))/isnull(vlbenchMTD.bench,vlbenchFirstDispo.bench) as RelativePerfMTD, 
      (vlbench1.Price-isnull(vlbenchWTD.Price,vlbenchFirstDispo.Price))/isnull(vlbenchWTD.Price,vlbenchFirstDispo.Price) - (vlbench1.bench-isnull(vlbenchWTD.bench,vlbenchFirstDispo.bench))/isnull(vlbenchWTD.bench,vlbenchFirstDispo.bench) as RelativePerfWTD, 
      (vlbench1.Price-isnull(vlbenchQTD.Price,vlbenchFirstDispo.Price))/isnull(vlbenchQTD.Price,vlbenchFirstDispo.Price) - (vlbench1.bench-isnull(vlbenchQTD.bench,vlbenchFirstDispo.bench))/isnull(vlbenchQTD.bench,vlbenchFirstDispo.bench) as RelativePerfQTD, 
      -- 0,2 End 

if(@typeperf = 2 or 0) then select 


    USE [F2B_VOM_TST] 
    GO 
    /****** Object: StoredProcedure [p_data].[P_Moa_GetAumNavBenchOnPtsId] Script Date: 11/10/2013 10:36:28 ******/ 
    SET ANSI_NULLS ON 
    GO 
    SET QUOTED_IDENTIFIER ON 
    GO 
    ALTER PROCEDURE [p_data].[P_Moa_GetAumNavBenchOnPtsId] 
    @DateDebut dateTime,@DateFin datetime,@Part integer,@Devise varchar(10),@PtfId integer,@Frequence varchar(1),@TypePerf integer=0 

    WITH EXEC AS CALLER 
    AS 

    Declare @AumQuery AS NVarchar(max) 


    -- 0,1,2,3 Begin 

    create table #TEMP_VL1 
     ([PtsId] int, 
      [Date] datetime 
     ) 

    -- on calcule le dernier jour de l'année précedente à la date de debut. 
    declare @FinAnneePrecedente datetime 

    select @FinAnneePrecedente=Max(Date) from TD_Time where Date<Cast((Year(@DateDebut)) as varchar)+'0101' and 
      WeekDayLib not in ('Sunday','Saturday') 


    --CASE 
    -- WHEN @selectField1 THEN Field1 
    -- WHEN @selectField2 THEN Field2 
    -- ELSE someDefaultField 
    --END 

    select 

    pp.Dat as Date,ptf.Lib as PtfLib, pt.Lib ,Isin,DevCot,pp.Price, 
    -- 0,1,2,3 End 



    -- 0,3 Begin 
    --case 
    -- when @TypePerf=0 or @TypePerf=3 then 
    pp.Aum,pp.AumEur, 
    ---end 
    -- 0,3 End 

    -- 0,1,2,3 Begin 
    bp.Price bench, 
    -- 0,1,2,3 End 

    -- 0 Begin 
    ptf.Cod, 
    pt.PtsId,ptf.PtfId, 
    ptf.Gest,ptf.IsDedicatedFund, 
    case 
     when ptf.Gest='Actions' and ptf.IsDedicatedFund=0 then 1 
     when ptf.Gest='Diversifiée' and ptf.IsDedicatedFund=0 then 2 
     when ptf.Gest='Taux' and ptf.IsDedicatedFund=0 then 3 
     when ptf.Gest='Profilée' and ptf.IsDedicatedFund=0 then 4 
     when ptf.IsDedicatedFund=1 then 5 
    end Classe, 
    ti.WeekDayLib,ti.MonthYear_Lib,ti.Annee 
    -- 0 End 

    -- 0,1,2,3 Begin 
    into #VL_BENCHMARK 
    from TF_PartPrice pp 
    inner join TD_Time ti on ti.Date=pp.Dat 
    inner join TD_Part pt on pp.PtsId=pt.PtsId 
    left join TF_BenchmarkPrice bp on pp.Dat=bp.Dat and bp.TypPosId=3 and bp.IsCurCtb=1 and bp.PtsId=pp.PtsId 
    inner join TD_Portefeuille ptf on pt.PtfId=ptf.PtfId 
    where 
     pp.IsCurCtb=1 and pp.TypPosId=3 and 
     ptf.Statut=1 and 
     pp.Dat between @FinAnneePrecedente and @DateFin and 
     ptf.IsTraded=1 


    if (@Frequence='q') 
    begin 
     insert into #TEMP_VL1 (PtsId,Date) 
     select PtsId,max(Date) 
     from #VL_BENCHMARK 
     group by PtsId,Date 
    end 

    -- dans le cas d'un rapport monthly, 
    if (@Frequence='m') 
     begin 
     insert into #TEMP_VL1 (PtsId,Date) 
     select PtsId,max(Date) 
     from #VL_BENCHMARK 
     group by PtsId,MonthYear_Lib 
     end 

    if (@Frequence='a') 
    begin 
     insert into #TEMP_VL1 (PtsId,Date) 
     select PtsId,max(Date) 
     from #VL_BENCHMARK 
     group by PtsId,Annee 
    end 

    if (@Frequence='w') 
    begin 
     insert into #TEMP_VL1 (PtsId,Date) 
     select PtsId,max(Date) 
     from #VL_BENCHMARK 
     where DATEPART(weekday,Date) in (2,3,4,5) 
     group by PtsId,DatePart(week,Date),DATEPART(year,Date) 
    end 

    -- 0,1,2,3 End 


    -- 0,3 Begin 
    -- Calcul AumEur par Ptf 
    select Date, PtfId,sum(AumEur) PtfAumEur 
    into #SOMME_AUM_EUR 
    from #VL_BENCHMARK 
    group by Date,PtfId 
    -- 0,3 End 

    select 
      -- 0,1,2,3 Begin 
      vlbench1.Date, 
      vlbench1.PtfLib, 
      vlbench1.Lib, 
      vlbench1.Isin, 
      vlbench1.DevCot, 
      vlbench1.Price , 
      -- 0,1,2,3 End 

      -- 0,3 Begin 
      vlbench1.Aum, 
      vlbench1.AumEur, 
      -- 0,3 End 

      -- 0,1,2,3 Begin 
      isnull(vlbench1.bench,0)bench, 
      --0,1,2,3 End 

      -- 0 Begin 
      vlbench1.Cod, 
      vlbench1.PtsId, 
      vlbench1D.Price as PreviousPrice, 
      vlbench1D.bench as PreviousBench, 
      vlbenchYTD.Price as PreviousYearPrice, 
      vlbenchYTD.bench as PreviousYearBench, 
      vlbenchMTD.Price as PreviousMonthPrice, 
      vlbenchMTD.bench as PreviousMonthBench, 
      vlbenchWTD.Price as PreviousWeekPrice, 
      vlbenchWTD.bench as PreviousWeekBench, 
      vlbenchQTD.Price as PreviousQuaterPrice, 
      vlbenchQTD.bench as PreviousQuaterBench, 
      vlbenchFirstDispo.Price as FirstPriceDispo, 
      vlbenchFirstDispo.bench as FirstBenchDispo, 
      -- 0 End 

      -- 0,1 Begin 
      (vlbench1.Price-isnull(vlbench1D.Price,vlbenchFirstDispo.Price))/isnull(vlbench1D.Price,vlbenchFirstDispo.Price) as VLPerf1Day, 
      (vlbench1.Price-isnull(vlbenchWTD.Price,vlbenchFirstDispo.Price))/isnull(vlbenchWTD.Price,vlbenchFirstDispo.Price) as VLPerfWTD, 
      (vlbench1.Price-isnull(vlbenchMTD.Price,vlbenchFirstDispo.Price))/isnull(vlbenchMTD.Price,vlbenchFirstDispo.Price) as VLPerfMTD, 
      (vlbench1.Price-isnull(vlbenchQTD.Price,vlbenchFirstDispo.Price))/isnull(vlbenchQTD.Price,vlbenchFirstDispo.Price) as VLPerfQTD, 
      (vlbench1.Price-isnull(vlbenchYTD.Price,vlbenchFirstDispo.Price))/isnull(vlbenchYTD.Price,vlbenchFirstDispo.Price) as VLPerfYTOD, 
      (vlbench1.bench-isnull(vlbench1D.bench,vlbenchFirstDispo.bench))/isnull(vlbench1D.bench,vlbenchFirstDispo.bench) as BenchPerf1Day, 
      (vlbench1.bench-isnull(vlbenchWTD.bench,vlbenchFirstDispo.bench))/isnull(vlbenchWTD.bench,vlbenchFirstDispo.bench) as BenchPerfWTD, 
      (vlbench1.bench-isnull(vlbenchMTD.bench,vlbenchFirstDispo.bench))/isnull(vlbenchMTD.bench,vlbenchFirstDispo.bench) as BenchPerfMTD, 
      (vlbench1.bench-isnull(vlbenchQTD.bench,vlbenchFirstDispo.bench))/isnull(vlbenchQTD.bench,vlbenchFirstDispo.bench) as BenchPerfQTD, 
      (vlbench1.bench-isnull(vlbenchYTD.bench,vlbenchFirstDispo.bench))/isnull(vlbenchYTD.bench,vlbenchFirstDispo.bench) as BenchPerfYTOD, 
      -- 0,1 End 

      -- 0,2 Begin 
      (vlbench1.Price-isnull(vlbench1D.Price,vlbenchFirstDispo.Price))/isnull(vlbench1D.Price,vlbenchFirstDispo.Price) - (vlbench1.bench-isnull(vlbench1D.bench,vlbenchFirstDispo.bench))/isnull(vlbench1D.bench,vlbenchFirstDispo.bench) as RelativePerf1D, 
      (vlbench1.Price-isnull(vlbenchYTD.Price,vlbenchFirstDispo.Price))/isnull(vlbenchYTD.Price,vlbenchFirstDispo.Price) - (vlbench1.bench-isnull(vlbenchYTD.bench,vlbenchFirstDispo.bench))/isnull(vlbenchYTD.bench,vlbenchFirstDispo.bench) as RelativePefYTOD, 
      (vlbench1.Price-isnull(vlbenchMTD.Price,vlbenchFirstDispo.Price))/isnull(vlbenchMTD.Price,vlbenchFirstDispo.Price) - (vlbench1.bench-isnull(vlbenchMTD.bench,vlbenchFirstDispo.bench))/isnull(vlbenchMTD.bench,vlbenchFirstDispo.bench) as RelativePerfMTD, 
      (vlbench1.Price-isnull(vlbenchWTD.Price,vlbenchFirstDispo.Price))/isnull(vlbenchWTD.Price,vlbenchFirstDispo.Price) - (vlbench1.bench-isnull(vlbenchWTD.bench,vlbenchFirstDispo.bench))/isnull(vlbenchWTD.bench,vlbenchFirstDispo.bench) as RelativePerfWTD, 
      (vlbench1.Price-isnull(vlbenchQTD.Price,vlbenchFirstDispo.Price))/isnull(vlbenchQTD.Price,vlbenchFirstDispo.Price) - (vlbench1.bench-isnull(vlbenchQTD.bench,vlbenchFirstDispo.bench))/isnull(vlbenchQTD.bench,vlbenchFirstDispo.bench) as RelativePerfQTD, 
      -- 0,2 End 

      -- 0,3 Begin 
      sumAumEur.PtfAumEur, 
      -- 0,3 End 

      -- 0 Begin 
      vlbench1.Gest, 
      vlbench1.IsDedicatedFund, 
      vlbench1.Classe 
      -- 0 End 

    -- 0,1,2,3 Begin 
    from #VL_BENCHMARK vlbench1 
    left join #VL_BENCHMARK vlbench1D on vlbench1D.PtsId=vlbench1.PtsId and vlbench1D.Date=(select max(Date) from #VL_BENCHMARK where PtsId=vlbench1.PtsId and Date<vlbench1.Date) 
    left join #VL_BENCHMARK vlbenchYTD on vlbenchYTD.PtsId=vlbench1.PtsId and vlbenchYTD.Date=(select max(Date) from #VL_BENCHMARK where PtsId=vlbench1.PtsId and Date<DATEADD(yy,DATEDIFF(yy,0,vlbench1.Date),0)) 
    left join #VL_BENCHMARK vlbenchMTD on vlbenchMTD.PtsId=vlbench1.PtsId and vlbenchMTD.Date=(select max(Date) from #VL_BENCHMARK where PtsId=vlbench1.PtsId and Date<DATEADD(mm,DATEDIFF(mm,0,vlbench1.Date),0)) 
    left join #VL_BENCHMARK vlbenchWTD on vlbenchWTD.PtsId=vlbench1.PtsId and vlbenchWTD.Date=(select max(Date) from #VL_BENCHMARK where PtsId=vlbench1.PtsId and Date<vlbench1.Date and datename(dw,Date)='Thursday') 
    left join #VL_BENCHMARK vlbenchQTD on vlbenchQTD.PtsId=vlbench1.PtsId and vlbenchQTD.Date=(select max(Date) from #VL_BENCHMARK where PtsId=vlbench1.PtsId and Date<DateAdd(qq,DATEPART(Quarter ,vlbench1.Date)-1 ,DATEADD(yy,DATEDIFF(yy,0,vlbench1.Date),0))) 
    -- 0,1,2,3 End 

    -- 0,1,2,3 Begin 
    left join #VL_BENCHMARK vlbenchFirstDispo on vlbenchFirstDispo.PtsId=vlbench1.PtsId and vlbenchFirstDispo.Date=(select min(Date) from #VL_BENCHMARK where PtsId=vlbench1.PtsId and Date>DATEADD(yy,DATEDIFF(yy,0,vlbench1.Date),0)) 
    -- 0,1,2,3 End 

    -- 0,3 Begin 
    left join #SOMME_AUM_EUR sumAumEur on sumAumEur.PtfId=vlbench1.PtfId and sumAumEur.Date=vlbench1.Date 
    -- 0,3 End 

    -- 0,1,2,3 Begin 
    inner join #TEMP_VL1 tpvl1 on vlbench1.Date=tpvl1.Date and vlbench1.PtsId=tpvl1.PtsId 
    -- 0,1,2,3 End 

    -- 0,1,2,3 Begin 
    where vlbench1.Date between @DateDebut and @DateFin 
     and (@Part=-1 or (@Part<>-1 and vlbench1.PtsId=@Part)) 
     and (@Devise='All' or (@Devise<>'All' and vlbench1.DevCot=@Devise)) 
     and (@PtfId=-1 or (@PtfId<>-1 and vlbench1.PtfId=@PtfId)) 
    order by vlbench1.Date,vlbench1.Classe,vlbench1.PtfLib,vlbench1.Lib 
    drop table #VL_BENCHMARK 
    -- 0,1,2,3 End 

    -- 0,3 Begin 
    drop table #SOMME_AUM_EUR 
    -- 0,3 End 

    -- 0,1,2,3 Begin 
    drop table #TEMP_VL1 
    -- 0,1,2,3 End 

    exec P_Moa_GetAumNavBenchOnPtsId 
    @DateDebut ='1-10-2012',@DateFin ='1-10-2013',@Part=-1,@Devise ='All',@PtfId =-1,@Frequence ='w', @TypePerf =1 

Answer 1

CASE 
    WHEN @typePerf = 2 THEN 
     SELECT ColA, ColB From MyTable 
    WHEN @typePerf = 3 THEN 
     SELECT ColB, ColC From MyTable 
    ELSE 
     SELECT ColC, ColD From MyTable 
END 

OR

DECLARE @MyWhere varchar(75)  
DECLARE @MySQL varchar(1000) 
SELECT @MySQL "SELECT " 
CASE 
    WHEN @typePerf = 2 THEN 
     SELECT @MySQL = @MySQL + 'ColA, ColB ' 
    WHEN @typePerf = 3 THEN 
     SELECT @MySQL = @MySQL + 'ColB, ColC ' 
    ELSE 
     SELECT @MySQL = @MySQL + 'ColC, ColD ' 
END 

SELECT @MySQL = @MySQL + 'From MyTable WHERE MyName = @MyWhere' 


EXECUTE sp_executesql @MySQL, N'@MyWhere nvarchar(75)', @MyWhere = @MyWhere