How to use posgresql 'interval' in Django?












4














Here is my PostgreSQL statement.



select round(sum("amount") filter(where "date">=now()-interval '12 months')/12,0) as avg_12month from "amountTab"


How to use this in Django?



I have an object called 'Devc', with attribute 'date'.



I want to get the sum of the specific data within past 12 months, not past 365 days.










share|improve this question





























    4














    Here is my PostgreSQL statement.



    select round(sum("amount") filter(where "date">=now()-interval '12 months')/12,0) as avg_12month from "amountTab"


    How to use this in Django?



    I have an object called 'Devc', with attribute 'date'.



    I want to get the sum of the specific data within past 12 months, not past 365 days.










    share|improve this question



























      4












      4








      4







      Here is my PostgreSQL statement.



      select round(sum("amount") filter(where "date">=now()-interval '12 months')/12,0) as avg_12month from "amountTab"


      How to use this in Django?



      I have an object called 'Devc', with attribute 'date'.



      I want to get the sum of the specific data within past 12 months, not past 365 days.










      share|improve this question















      Here is my PostgreSQL statement.



      select round(sum("amount") filter(where "date">=now()-interval '12 months')/12,0) as avg_12month from "amountTab"


      How to use this in Django?



      I have an object called 'Devc', with attribute 'date'.



      I want to get the sum of the specific data within past 12 months, not past 365 days.







      django postgresql intervals






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Nov 21 at 3:06

























      asked Nov 21 at 2:31









      Yvonne

      595




      595
























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          You can try this to get the data within the past 12 months.



          today= datetime.now()
          current_month_first_day = today.replace(day = 1)
          previous_month_last_day = current_month_first_day - timedelta(days = 1)
          past_12_month_first_day = previous_month_last_day - timedelta(days = 360)
          past_12_month_first_day = past_12_month_first_day.replace(day = 1)

          past_12_month_avg = Devc.objects.filter(date__range=(past_12_month_first_day,current_month_first_day)).aggregate(Sum('amount'))['amount']





          share|improve this answer





















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            1 Answer
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            active

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            active

            oldest

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            1














            You can try this to get the data within the past 12 months.



            today= datetime.now()
            current_month_first_day = today.replace(day = 1)
            previous_month_last_day = current_month_first_day - timedelta(days = 1)
            past_12_month_first_day = previous_month_last_day - timedelta(days = 360)
            past_12_month_first_day = past_12_month_first_day.replace(day = 1)

            past_12_month_avg = Devc.objects.filter(date__range=(past_12_month_first_day,current_month_first_day)).aggregate(Sum('amount'))['amount']





            share|improve this answer


























              1














              You can try this to get the data within the past 12 months.



              today= datetime.now()
              current_month_first_day = today.replace(day = 1)
              previous_month_last_day = current_month_first_day - timedelta(days = 1)
              past_12_month_first_day = previous_month_last_day - timedelta(days = 360)
              past_12_month_first_day = past_12_month_first_day.replace(day = 1)

              past_12_month_avg = Devc.objects.filter(date__range=(past_12_month_first_day,current_month_first_day)).aggregate(Sum('amount'))['amount']





              share|improve this answer
























                1












                1








                1






                You can try this to get the data within the past 12 months.



                today= datetime.now()
                current_month_first_day = today.replace(day = 1)
                previous_month_last_day = current_month_first_day - timedelta(days = 1)
                past_12_month_first_day = previous_month_last_day - timedelta(days = 360)
                past_12_month_first_day = past_12_month_first_day.replace(day = 1)

                past_12_month_avg = Devc.objects.filter(date__range=(past_12_month_first_day,current_month_first_day)).aggregate(Sum('amount'))['amount']





                share|improve this answer












                You can try this to get the data within the past 12 months.



                today= datetime.now()
                current_month_first_day = today.replace(day = 1)
                previous_month_last_day = current_month_first_day - timedelta(days = 1)
                past_12_month_first_day = previous_month_last_day - timedelta(days = 360)
                past_12_month_first_day = past_12_month_first_day.replace(day = 1)

                past_12_month_avg = Devc.objects.filter(date__range=(past_12_month_first_day,current_month_first_day)).aggregate(Sum('amount'))['amount']






                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Nov 21 at 7:12









                YvKl

                1066




                1066






























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