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Message Posted: Fri, 05 Jan 2007 @ 16:13:50 GMT


     
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Subj:   Re: Counting a column multiple times based on CASE
 
From:   Dieter Noeth

Anomy.Anom wrote:

          > select id
          >   ,count(Case When  frst_prch_days  between 0 and  90
          >                        Then trxn_id
          >                        Else    0
          >                end )As txns_1
          >   ,count(case when frst_prch_days  between 91 and 365
          >                      then trxn_id
          >                      else 0
          >      end) as txns_2
          >   ,count(case when frst_prch_days  between 366 and 548
          >                      then trxn_id
          >                      else 0
          >     end) as txns_3
          >    ,count(case when frst_prch_days  ge 549
          >             then trxn_id
          >                       else 0
          >     end) as txns_4
          > from temp3
          > group by 1

COUNT counts non-NULL rows and the result of your CASE is 1 or 0, i.e. non-NULL.

So replace "ELSE 0" with "ELSE NULL" or simply remove it.

Even better, use SUM instead of COUNT.


Dieter



     
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