Product sales qty comparing multiple years

[former_member814508]

I would like to make a report that shows total sales of a product across multiple years.
So it would look something like this:

Product 1 | Total quantity sold in year 1 | Total quantity sold in year 2 etc.
Product 2 | Total quantity sold in year 1 | Total quantity sold in year 2 etc.

I've tried this but it returns only 0's.

SELECT Distinct T1.ItemCode, (isnull((SELECT SUM((case when SUBSTRING((CONVERT(VARCHAR(11),T4.DOCDATE,106)),4,11) like '2020%' then T4.Quantity else 0 end))

FROM INV1 T4 WHERE T4.ItemCode=T1.ItemCode ),0)) '2020',

(isnull((SELECT SUM((case when SUBSTRING((CONVERT(VARCHAR(11),T4.DOCDATE,106)),4,11) like '2021%' then T4.Quantity else 0 end))

FROM INV1 T4 WHERE T4.ItemCode=T1.ItemCode ),0)) '2021',

(isnull((SELECT SUM((case when SUBSTRING((CONVERT(VARCHAR(11),T4.DOCDATE,106)),4,11) like '2022%' then T4.Quantity else 0 end))

FROM INV1 T4 WHERE T4.ItemCode=T1.ItemCode ),0)) '2022'

FROM OINV T0 INNER JOIN INV1 T1 ON T0.DocEntry = T1.DocEntry

Group By SUBSTRING((CONVERT(VARCHAR(11),T0.DOCDATE,106)),4,11), T1.ItemCode

Having (isnull((SELECT SUM((case when SUBSTRING((CONVERT(VARCHAR(11),T4.DOCDATE,106)),4,11) like '% %' then T4.Quantity else 0 end))

FROM INV1 T4 WHERE T4.ItemCode=T1.ItemCode ),0))>0

[Former Member]

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[former_member814508]

I've found the solution. I was converting the string to an incorrect format: SUBSTRING((CONVERT(VARCHAR(11),T4.DOCDATE,106)),4,11) returns MMM-YYYY.

This function would work when calculating totals per month. To calculated per year I changed the start of the string to 8 so it would only return YYYY. SUBSTRING((CONVERT(VARCHAR(11),T4.DOCDATE,106)),8,11)