Question

I’ve a query which returns the following data

as you can see in the image the colored groups are similar regarding column “A”
i want to take the first occurrence of these rows regarding column “A” and discard the rest.

so i can end up with this result.

any solutions?

Thanks 🙂

Update:

this is the original query results

Answer 1

I would do it as follows:

WITH T(A, B, C, D, RowNum) AS 
(
    SELECT A, B, C, D, ROW_NUMBER() OVER (PARTITION BY A ORDER BY A)
    FROM MyTable
)
SELECT * FROM T
WHERE 
    RowNum = 1