如何獲得以下輸出？

Question

如何獲得以下輸出？

輸入：

t1 
----------------- 
col1 col2 
---------------- 
2  a 
1  c 
3  b 
---------------- 

輸出：

t1 
----------------- 
col1  col2 
---------------- 
1   a 
2   b 
3   c 
---------------- 

Answer 1

select C1.col1, C2.col2 
from 
    (select col1, row_number() over (order by col1) rn 
    from t1) C1 
join 
    (select col2, row_number() over (order by col2) rn 
    from t1) C2 
on C1.rn=C2.rn 
order by C1.rn 

Answer 2

您可以嘗試使用行號，如：

SELECT row_number() OVER (ORDER BY a.col2) as col1, col2 
FROM t1 a ORDER BY a.col2 

Answer 3

我認爲以下查詢可能會對您有所幫助。

SELECT * FROM t1 ORDER BY col1 ; 

請查看此鏈接，更多的實踐

http://www.sqlfiddle.com/#!3/2e3e9/1/0

Answer 4

試試這個..

select col1,col2 from 
(select col1,rownum rn from(select col1 from t1 order by col1)) a, 
(select col2,rownum rn from(select col2 from t1 order by col2)) b 
where a.rn=b.rn