如何轉行到

Question

我在甲骨文

Number Text 
12345 ab 
12345 abc 
12345 acbd 

以下數據我怎麼能轉換它成爲列：

Number Text1 Text2 Text3 
12345 ab abc abcd 

如何做到這一點使用SQL在Oracle中？

Answer 1

爲了數據的多行旋轉爲列，首先我會用row_number()，然後你可以使用聚合函數CASE表達式來得到最終結果：

select "Number", 
    max(case when seq = 1 then "Text" end) Text1, 
    max(case when seq = 2 then "Text" end) Text2, 
    max(case when seq = 3 then "Text" end) Text3 
from 
(
    select "Number", "Text", 
    row_number() over(partition by "Number" order by "Text") seq 
    from yourtable 
) d 
group by "Number"; 

見SQL Fiddle with Demo