Re: group by 3 fields

On Sun, Feb 26, 2017 at 6:55 AM, Daniel Roseman <daniel@roseman.org.uk> wrote:
> On Sunday, 26 February 2017 11:11:39 UTC, Larry....@gmail.com wrote:
>>
>> Order by is not the same as group by. Group by does aggregation
>>
>
> You should explain what you want to achieve. Grouping is pointless on its
> own. In any case, when working with an ORM like Django's it is generally not
> helpful to think in terms of SQL.

Of course grouping is pointless on its own. I need to do grouping and
aggregation (summing). But I need to group by 3 columns. I don't know
why you say it's not helpful to think in SQL. That is a language I
have worked in for over 20 years, and when I see a querying need that
is how I think, and then I see how can I do that with the ORM. Often I
cannot and have to use raw SQL. But I always do try and see if it can
be done in the ORM.

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