* cristivoinicaru <cristivoinicaru@dmhi.ct.ro> [2004-10-25 10:05:22 +0200]:
> Explanations:
> I want like sql interogation to select only one record from each
> "gc" group record (who has the same code "gc" (that means that the
> "gc" field will be unique key)) with the following two condition:
>
> 1)from each "gc" group of records to select the record who has the
> value of "ora" field maxim.
>
> 2)if two ore more record have the same value of the maxim value of
> the "ora" to select oly one of them
Try this out; this is from memory, so it hasn't been tested.
SELECT DISTINCT max(gc), co, data, ora FROM temp50 GROUP BY co, data, ora;
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