Get only Max of each distinct?

Get only Max of each distinct?

am 07.11.2007 10:49:32 von sunilkes

Hello,

I have a table

ItemID Version

12 1.0
12 1.1
12 2.0
13 2.0
13 1.0
14 1.0
15 1.0
15 5.0
15 2.1

How do I write a Select query to get me all distinct item IDs, whichm
are of the latest version?

Like this:

ItemID Version
12 2.0
13 2.0
14 1.0
15 2.1

Any help would be appreciated.

Thanks

Re: Get only Max of each distinct?

am 07.11.2007 11:10:27 von Ed Murphy

sunilkes@gmail.com wrote:

> I have a table
>
> ItemID Version
>
> 12 1.0
> 12 1.1
> 12 2.0
> 13 2.0
> 13 1.0
> 14 1.0
> 15 1.0
> 15 5.0
I assume 5.0 is a typo for 2.0
> 15 2.1
>
> How do I write a Select query to get me all distinct item IDs, whichm
> are of the latest version?
>
> Like this:
>
> ItemID Version
> 12 2.0
> 13 2.0
> 14 1.0
> 15 2.1

This smells like homework. Look up MAX() and GROUP BY.

Re: Get only Max of each distinct?

am 07.11.2007 12:35:34 von sunilkes

On Nov 7, 10:10 am, Ed Murphy wrote:
> sunil...@gmail.com wrote:
> > I have a table
>
> > ItemID Version
>
> > 12 1.0
> > 12 1.1
> > 12 2.0
> > 13 2.0
> > 13 1.0
> > 14 1.0
> > 15 1.0
> > 15 5.0
>
> I assume 5.0 is a typo for 2.0
>
Got it, actually it was pretty simple, was trying it incorrectly
earlier !

SELECT MAX(Version_Number) AS Maxim, ItemId
FROM tblItems
GROUP BY ItemId

Thanks

> > 15 2.1

>
> > How do I write a Select query to get me all distinct item IDs, whichm
> > are of the latest version?
>
> > Like this:
>
> > ItemID Version
> > 12 2.0
> > 13 2.0
> > 14 1.0
> > 15 2.1
>
> This smells like homework. Look up MAX() and GROUP BY.