從行創建列名稱？

Question

我有這樣的數據：

name  | coulmnnuber 
Newyork | 1 
washington| 2 
denmark | 3 
Holand | 4 

數據應該是這樣的：

1   2   3   4 
New york Washington denmark Holand 

Answer 1

可以使用聚合函數與CASE表達式的數據行轉換爲列：

select 
    max(case when coulmnnuber = 1 then name end) [1], 
    max(case when coulmnnuber = 2 then name end) [2], 
    max(case when coulmnnuber = 3 then name end) [3], 
    max(case when coulmnnuber = 4 then name end) [4]    
from yourtable; 

請參閱SQL Fiddle with Demo

或者你可以使用旋轉功能：

select [1], [2], [3], [4] 
from yourtable 
pivot 
(
    max(name) 
    for coulmnnuber in ([1], [2], [3], [4]) 
) piv; 

見SQL Fiddle with Demo