[英]T-sql run 1st query and then CASE 2nd query and output data or 'No'
[英]SQL query: pivot data by 1st and 2nd date
我在Microsoft SQL Server中有此表:
Id Date Value
111 1/1/19 1
111 2/1/19 2
222 5/1/19 4
222 4/1/19 3
有没有一种方法可以将数据重新排列成如下所示:
Id OldDate NewDate OldValue NewValue
111 1/1/19 1/2/19 1 2
222 4/1/19 5/1/19 3 4
使用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;
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