當條件爲

Question

時，如何循環一個案例我有名爲col1，col2的列到col12，我有exm1，exm2到exm12。

我該怎麼做？

declare @i= 1 

do until i=12 
(

case 
when col@i <= 25000 then '1. xxxx <= 25K   ' 

when col@i > 25000 and col@i <=100000 then '2. 25K < xxxx <= 100K ' 

when col@i > 100000 then '6. xxxx >= 100K ' 

else end as column_group_@1 

set i=i+1 

) 

同樣與EXM1

Answer 1

IF OBJECT_ID('tempdb..#temp1') IS NOT NULL DROP TABLE #temp1 
GO 
create table #Temp1(col@i int) 
IF OBJECT_ID('tempdb..#temp2') IS NOT NULL DROP TABLE #temp2 
GO 
create table #Temp2(qrystr varchar(max)) 

declare @i int 
declare @strcon varchar(5) 
declare @qrystr varchar(max) 
set @i= 1 
while(@i<12) 
begin 
    set @strcon=rtrim(ltrim(str(@i))) 
    set @qrystr=' 
    select 
     ( 
      case 
      when col' + @strcon + '<= 25000 then ''1. xxxx <= 25K  '' 
      when ' + @strcon +'> 25000 and ' + @strcon +' <=100000 then ''2. 25K < xxxx <= 100K '' 
      when '+ @strcon +'> 100000 then ''6. xxxx >= 100K '' 
      end 
     )as column_group_@1 
    from YourTableName' 
    Insert Into #Temp2 values(@qrystr) 
set @i=@i+1 

end 
Select * From #Temp2