SQL查询：在第1和第2日期之前进行数据透视

Question

I have this table in Microsoft SQL Server:

 Id   Date   Value
 111  1/1/19 1
 111  2/1/19 2
 222  5/1/19 4
 222  4/1/19 3 

Is there a way I can rearrange the data into something like this:

 Id   OldDate  NewDate  OldValue NewValue
 111  1/1/19   1/2/19   1        2
 222  4/1/19   5/1/19   3        4

Answer 1

Use lag() :

select t.*
from (select t.*,
             lag(date) over (partition by id order by date) as prev_date,
             lag(value) over (partition by id order by date) as prev_value
      from t
     ) t
where prev_date is not null;