It's difficult to even imagine such query (possible but very
inefficient),
i think you need to change your architecture
or do this grouping in bussines layer
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"Django use
On 4 Aug., 16:40, krylatij wrote:
> You need to use raw sql. (http://docs.djangoproject.com/en/dev/topics/
> db/sql/#topics-db-sql)
yes. i know that i can use raw sql. but if it's possible, i want to
use ORM.
>
> I don't understand what will be if there are more then 2 channels at
> the same
You need to use raw sql. (http://docs.djangoproject.com/en/dev/topics/
db/sql/#topics-db-sql)
I don't understand what will be if there are more then 2 channels at
the same datetime?
So i can't provide you solutions sample.
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tom pisze:
> Hi group,
>
> i build a model to save measurement data. a measurement entry has
> always a channel (that is the source where the data comes from), a
> value (for example 1.04), a unit (for example m/s or Hz) and a
> timestamp.
> The timestamp and the channel are together unique. every
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