为什么CASE WHEN语句组类似的变量（SAS PROC SQL）

Question

当我使用的情况时，声明是这样的：

...

, case when majcat in (1,2,3,4,5) then "Inpatient" 
     when majcat in (3) then "IP-Surgical" 
     else "N/A" end as serv_cat 

服务器不保留住院和IP - 分开的手术将它们分组在一起。为什么会发生这种情况，我该如何解决？

这里是上下文的完整代码：

proc sql; 
create table raw_claims_summ as 
select pcp_npi 
     , pcp_name 
     , practice_name 
     , rpt_cut_1 
     , rpt_cut_2 
     , sum(paid) 
     , sum(admits) 
     , sum(days) 
     , sum(units) 
     , case when majcat in (1,2,3,4,5) then "Inpatient" 
      when majcat in (3) then "IP-Surgical" 
      else "N/A" end as serv_cat 
from raw_claims 
group by 1,2,3,4,5,10 
order by 1 
;quit; 

Answer 1

你应该从第一when条款删除3：

CASE WHEN majcat IN (1, 2, 4, 5) THEN "Inpatient" 
    -- 3 removed here ---^ 
    WHEN majcat in (3) THEN "IP-Surgical" 
    ELSE "N/A" 
END AS serv_cat