sql - グループ変数/順序変数の重複値を返すSAS proc sql

Question

資産 1 ごとに四半期ごとに 1 行を提供するかなり単純な SQL があります。代わりに、グループごとに複数の行を取得します。

以下は、SQL、SAS データ ステップ、および出力データの一部です。重複行の数 (以下のデータでは 227708) は、asset1 の行数である Num_borrowers と同じです。

proc sql outobs=max;

create table table1 as
select 
    case 
        when period_dt ='01DEC2003'd then '2003Q4'
        when period_dt ='01DEC2004'd then '2004Q4'
        when period_dt ='01DEC2005'd then '2005Q4'
        when period_dt ='01DEC2006'd then '2006Q4'
        when period_dt ='01DEC2007'd then '2007Q4' 
        when period_dt ='01DEC2008'd then '2008Q4'
        when period_dt ='01DEC2009'd then '2009Q4'
        when period_dt ='01DEC2010'd then '2010Q4'
        when period_dt ='01DEC2011'd then '2011Q4'
        when period_dt ='01DEC2012'd then '2012Q4'
        when period_dt ='01DEC2013'd then '2013Q4'
        when period_dt ='01JUN2014'd then '2014Q2'   
    end as QTR,
    case 
        when MM_ASSET in ('C&I', 'Foreign', 'Leasing','Scored-WF','Scored-WB')  THEN 'C&I'
        when MM_ASSET='Construction' THEN 'Construction RE'
        when MM_ASSET='Mortgage-IP' THEN 'Income Producing RE'
        when MM_ASSET='Mortgage-OO' THEN 'Owner Occupied RE'
        when MM_ASSET='Mortgage-SF' THEN 'Mortgage-SF'
        when MM_ASSET='Unknown' THEN 'Other'
    end as asset1,
    count (period_dt) as Num_Borrowers, 
    exposure,
    co_itd,
    MM_NINEQTR_LOSS,
    MM_LIFE_LOSS
  from td_prod.OBLIGOR_COMBINED
  where period_dt in ('01DEC2003'd,'01DEC2004'd,'01DEC2005'd,'01DEC2006'd,'01DEC2007'd,'01DEC2008'd, '01DEC2009'd,'01DEC2010'd,'01DEC2011'd,'01DEC2012'd,'01DEC2013'd,'01JUN2014'd)
  and mm_asset in ('C&I','Foreign','Leasing','Construction','Mortgage-IP','Scored-WF','Scored-WB'
               'Mortgage-OO','Mortgage-SF','Unknown')
  group by 1,2
  order by 1,2;

quit;



data table2; set table1;

  Total_Exposure = exposure/1000000;
  if total_exposure = 0 then total_exposure=.;
  Total_Charge_Offs =co_itd/1000000;
  Total_9Q_Losses = MM_NINEQTR_LOSS/1000000;
  Total_Life_Losses = MM_LIFE_LOSS/1000000;
  avg_borrower_exp = total_exposure/num_borrowers;
  co_rate = total_charge_offs/total_exposure;
  life_lossR = Total_life_losses/total_exposure;
  nineQtr_lossR = total_9q_losses/total_exposure;

run;



*** sample of output data set ***;
qtr             asset1      num_borrowers
2003Q4          C&I             227708
2003Q4          C&I             227708
2003Q4          C&I             227708
2003Q4          C&I             227708
2003Q4          C&I             227708
2003Q4          C&I             227708
2003Q4          C&I             227708
2003Q4          C&I             227708
2003Q4          C&I             227708
2003Q4          C&I             227708
2003Q4          C&I             227708
2003Q4          C&I             227708
2003Q4          C&I             227708
2003Q4          C&I             227708
2003Q4          C&I             227708
2003Q4          C&I             227708