Re: Need help for constructing query

Marco <netuse(at)lavabit(dot)com> Friday 25 March 2011 14:25:47
> Hi,
>
> I have a table like this:
>
> id date min max value
> 1 2011-03-25 20 30 17
> 3 2011-03-21 40 55 43
> 3 2011-03-23 40 55 52
> 2 2011-02-25 5 2
> 4 2011-03-15 74
> 4 2011-03-25 128
> 1 2011-03-22 20 30 24
>
> I'm looking for a query that outputs the last rows (highest date) per id
> where the value is between min and max. I already have problems displaying
> the last rows per id. Something like
>
> select id, max(date) from mytable group by id;
>
> gives just the id and the date, not the other values. I think of doing this
> in two steps:
>
> 1) Display the rows with the highest date per id. That gives as many rows
> as ids exist.
> 2) Remove the rows that do not match ( value<max and value>min )
>
>
> Marco
SELECT * FROM where (min < value and value < max) and (id, date) in (
SELECT id, max(date) WHERE (min < value and value < max) group by id)

1st check (min < value and value < max) may be not needed, dependig what You
are looking for.

I didn't testd this