SQL来更改列顺序

Question

如何在列改变旧序列上与新的使用SQL Server 2005

old new 
    1 1 
    1 1 
    3 2 
    4 3 
    5 4 
    5 4 
    5 4 
    8 5 
    8 5 
    10 6 

Answer 1

使用window function dense_rank()没有PARTITION条款：

SELECT old, dense_rank() OVER (ORDER BY old) AS new 
FROM tbl; 

Answer 2

您是否在寻找DENSE_RANK（）

SELECT 
    T.* 
    ,DENSE_RANK() OVER (ORDER BY T.Old) As New 
FROM Table1 T 

Fiddle Demo

Answer 3

我认为你正在寻找dense_rank：

select dense_rank() over (order by old) rn, old 
from yourtable 
order by old 

• SQL Fiddle Demo