逆透視列轉換爲行（甲骨文）

Question

喜歡這個原來如此Pivoting rows into columns dynamically in Oracle

，但我想反其道而行之

我怎樣才能得到

ID  NAME AGE GENDER STATUS 
----  ----- ----- ------ -------- 
    1  Bob  30  male 
    2  Susan     married 

這個

ID  K  V 
----  ----- ----- 
    1  name Bob 
    1  age  30 
    1  gender male 
    2  name Susan 
    2  status married 

Answer 1

您正在查找unpivot。

select * from t 
unpivot (
      v for k in ("NAME","AGE","GENDER","STATUS") 
     ) u 

如果年齡列是整數，則可能有類型不匹配。在這種情況下，將其轉換爲字符之前unpivoting。

select * 
from (select id,name,to_char(age) age,gender,status from t) t 
unpivot (
     v for k in ("NAME","AGE","GENDER","STATUS") 
     ) u