I have a SQL that summarizes the quantity per week. The weeks that has no value does not exist in the table. How can I add these missing weeks with a 0 value in the SQL. Need this to use Avg and stddev functions.
SELECT t.material, t.description,
Sum(t.sales_quantity ) qty, to_char(t.Posting_Date,'IYYYIW') year_week
FROM tblBilling t
Where t.material = 'label900'
And t.Posting_date >= to_date('2008-10-20','yyyy-mm-dd')
And t.Posting_date <= to_date('2009-10-20','yyyy-mm-dd')
Group By t.material, t.description, to_char(t.Posting_Date,'IYYYIW')
This return:
material descriotion qty year_week
label900 test 20000 200850
label900 test 10000 200910
label900 test 5000 200912
label900 test 6000 200914
label900 test 9000 200920
I want it to complement the missing weeks with 0. Like this:
material descriotion qty year_week
label900 test 0 200843
label900 test 0 200844
label900 test 0 200845
label900 test 0 200846
label900 test 0 200847
label900 test 0 200848
label900 test 0 200849
label900 test 20000 200850
label900 test 0 200851
--and so on
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