>Cetin
>
>Here is the data from 2 plots.
>
> PLOT BA_98 SPECIES_98
> 1 0.0000 4
> 1 0.0000 4
> 1 1.7966 5
> 1 3.1062 5
> 1 1.2667 5
> 1 1.6731 5
> 1 4.2978 5
> 1 1.8975 5
> 1 2.5734 5
> 1 1.4487 10
> 1 8.2723 11
> 1 0.0000 11
> 1 1.9902 12
> 1 2.6810 12
> 1 2.2695 12
> 1 2.2695 12
> 1 2.2401 12
> 1 2.2636 12
> 1 2.3407 12
> 1 1.3380 12
> 1 3.9100 12
> 1 1.0244 12
> 1 1.2448 12
> 1 1.6985 12
> 1 1.3744 12
> 1 1.2101 12
> 1 0.9621 12
> 1 1.0724 12
> 1 1.1133 12
> 1 1.0968 12
> 1 1.0643 12
> 2 1.4393 5
> 2 4.8233 5
> 2 1.2535 5
> 2 2.9097 5
> 2 0.0000 5
> 2 0.0000 5
> 2 1.7189 5
> 2 3.6144 5
> 2 0.0000 5
> 2 0.0000 5
> 2 3.1964 7
> 2 1.6230 7
> 2 1.6379 7
> 2 5.4428 7
> 2 1.0443 7
> 2 0.0000 7
> 2 0.0000 12
> 2 0.0000 12
>
>I need to figure out which speces_98 has the highest ba_98 as well as how much that is for each occurance in trees.plot

And snswer would be this ? :

plot,ba_98,species_98
1,8.2723,11
2,5.4428,7

If so :

select * from trees t1 ;
  where ba_98 = ;
  (select max(ba_98) from trees t2 where t1.plot = t2.plot) ;
  order by plot

Cetin