Question

My today’s problem is that I have a table that has rows like that:

ID NAME NUMBER IDN
1  dsad 500600 12
1  dsad 600700 13
2  kkkk 111222 56
2  kkkk 333232 57

in one ID example 1 i have 2 identical names 2 different numbers and different IDN.

What i want is to extract single row For each Id where the idn value is the smaller one.
So I want to have sommething like that

1  dsad  500600 12
2  kkkk  111222 56

Is it posible to write a single sql to have that result? I tried to group that by ID and NAME and have the min(IDN) but I’m stuck with the number field 🙂 any ideas?

Answer 1

You were almost there, just add the MIN(Number) field.

SELECT  ID
        , NAME
        , MIN(NUMBER)
        , MIN(IDN)
FROM    ATable
GROUP BY
        ID
        , NAME

In response to comment

Following would get you the records with the MIN(IDN), regardless what the number for that specific record is.

SELECT  t.*
FROM    ATable t
        INNER JOIN (        
          SELECT  ID, IDN = MIN(IDN)
          FROM    ATable
          GROUP BY ID
        ) tmin ON tmin.ID = t.ID
                  AND tmin.IDN = t.IDN