Thursday, September 25, 2008

Re: [GENERAL] How to select rows that are the max for each subcategory?

select x,y,z
t join (select x, max(y) as my from t group by x) t1 on (t.x=t1.x and

best wishes


On Thu, Sep 25, 2008 at 20:01, Kynn Jones <> wrote:
> Suppose I have a table T that has, among its columns, the fields X and Y,
> where Y is an integer, and multiple rows with the same value of X are
> possible. I want to select the rows corresponding to the greatest values of
> Y for each value of X. E.g. suppose that T is
> X Y Z
> a 1 eenie
> a 3 meenie
> a 2 miny
> b 4 moe
> b 0 catch
> ...the result of the desired query would be
> a 3 meenie
> b 4 moe
> TIA!
> Kynnjo

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