拆分數據

Question

I have data in my table like this 

TrNo | ManRef | Transport 
001 ASC1  30000 
001 ASC1  15000 
002 ASC2  30000 

，我想成爲這樣的

TrNo | ManRef | Transport 1 | Transport 2 
001 ASC1  30000   15000 
002 ASC2  30000   - 

so..any一個可以幫助我，如何查詢該表的數據... pleaseee

Answer 1

假設你不需要去動態，與ROW_NUMBER（演唱會簡單的條件聚合）應該做的伎倆

例

Select TrNo 
     ,ManRef 
     ,sum(case when RN=1 then Transport else 0 end) as Transport1 
     ,sum(case when RN=2 then Transport else 0 end) as Transport2 
     ,sum(case when RN=3 then Transport else 0 end) as Transport3 
     ,sum(case when RN=4 then Transport else 0 end) as Transport4 
     ,sum(case when RN=5 then Transport else 0 end) as Transport5 
     ,sum(case when RN=6 then Transport else 0 end) as Transport6 
From (
     Select * 
       ,Row_Number() over (Partition By TrNo,ManRef Order By Transport Desc) as RN 
     From YourTable 
    ) A 
Group By TrNo,ManRef 

驗證結果