SQL - Case Statement

Question

SQL 2008/2005

我在Case Statement上有SQL Query Syntax問題 - 我在尋找一些幫助。這是Case Statement上的一個簡單的SQL語法問題。我已經在我的查詢中評論了這個場景，我已經附上了..請建議前進..！

select 
    stuff(Dr.DrugNDCNbr, 
      case when Dr.DrugNDCType in (50, 56) then 1 
       when Dr.DrugNDCType in (51, 57) then 6  
       when Dr.DrugNDCType = 52 then 10  
       -- when Dr.DrugNDCType = 49 then -- DO NOTHING .. GIVE THE ACTUAL VALUE 
      end, 0, '0') 
    from drug Dr 
    where Dr.drugnbrkey = 6284 

Answer 1

它的巢式病例表達你需要

select 
    case 
     when Dr.DrugNDCType = 49 then Dr.DrugNDCNbr 
     else 
       stuff ( Dr.DrugNDCNbr, 
       case 
         when Dr.DrugNDCType in (50, 56) then 1 
         when Dr.DrugNDCType in (51, 57) then 6  
         when Dr.DrugNDCType = 52 then 10  
       end, 0, '0') 
    end 

from drug Dr 
where Dr.drugnbrkey = 6284