Question

If I have a table named [Part] with columns [PartID],[IDNumber], and [Length] and data:

[PartID]  [IDNumber]  [Length]
1         Test1       50
2         Test1       60
3         Test2       50
4         Test3       70

How can I select just the top 2 records with a distinct IDNumber? After searching for a bit I have not been able to find a query that does what I want. I would like the results to look like this:

[PartID]  [IDNumber]  [Length]
1         Test1       50
3         Test2       50

What I have now:

Select distinct top 2
        [PartID],
        [IDNumber],
        [Length]
from
    [Part]

To clarify that the PartID is actually a GUID. I thought writing out the GUID for each record was getting a bit messing in my example data.

Answer 1

SELECT DISTINCT TOP 2 PartId, IdNumber, Length
FROM
(   SELECT PartId, IdNumber, Length, ROW_NUMBER() over(partition by IdNumber order by Length) Orden
    FROM [Ayuda]
) A
WHERE A.Orden = 1
ORDER BY Length