Question

I am trying to do something I don’t know if it’s doable. I have this query:

SELECT [CreatedOn]
FROM [MyTable]

As you can see in the image, there are different dates. Now what I want to achieve is to get the time difference between each date/time in each row. For example, diference between date in row1 and row2, then row2 and row3, etc…
Is that possible?
Thanks, Laziale

Answer 1

;WITH q AS (
SELECT
    CreatedOn,
    ROW_NUMBER() OVER (ORDER BY CreatedOn) AS rn
FROM
    MyTable
)
SELECT
    q1.CreatedOn AS Date,
    q2.CreatedOn AS NextDate,
    DATEDIFF(SECOND, q1.CreatedOn, q2.CreatedOn) AS SecondDiff
FROM 
    q q1 JOIN
    q q2 ON q1.rn + 1 = q2.rn