Question

How can we write the query for getting a set of rows where it was last updated grouped by a field name . Example

no – siteid – status – created_at

the ‘no’ number increases continuously as its the status report provided from another source. As in , Insertion happens 24/7 at some interval. But i want to check the status of 10 sites at the second i run the query .

There are only 10 sites . and i want to generate the report of the status of these 10

as in the last inserted query will give us the current status of the site.

I tried this

SELECT created_at,siteid  FROM [TOC].[dbo].[frame1] GROUP BY siteid ORDER BY created_at DESC

But no luck

Answer 1

I’m not actually sure what you want, can you give example input and output data?

For now here is something that might be useful to you…

WITH
  sequenced_data AS
(
  SELECT
    ROW_NUMBER() OVER (PARTITION BY site_id ORDER BY created_at DESC) AS sequence_id,
    *
  FROM
    [TOC].[dbo].[Frame1]
)
SELECT
  *
FROM
  sequenced_data
WHERE
  sequence_id = 1