Question

So I am trying to alter my sql code (see below for screenshot of current results + sql) to group the data by the month AND sum up all the paymentSplitAmounts. Each row should be a unique productId

So the end result would be something like

    productID        total        month
    1                500          11-2011
    2                650          11-2011
    3                250          11-2011
    1                100          10-2011
    2                150          10-2011
    3                750          10-2011

I can’t seem to get the syntax right. Where am I going wrong?

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https://i.stack.imgur.com/p8xzP.jpg

    select  
        cpd.paymentId, cpd.paymentId, cpd.productId, cpd.paymentSplitAmount, cp.campaignId, cp.paymentDate 
    from campaign_payment_detail cpd 
    inner join 
        campaign_payment cp on cp.paymentId = cpd.paymentId 
    inner join product on cpd.productId = product.productId 
    where 
    1=1 
    and cp.campaignId = 2413

Answer 1

Looks like you want to group then sort your results:

SELECT cpd.productId, SUM(cpd.paymentSplitAmount), DATE_FORMAT(cp.paymentDate, '%b-%Y')
  FROM campaign_payment_detail cpd
  JOIN campaign_payment cp ON cp.paymentId = cpd.paymentId
  JOIN product ON cpd.productId = product.productId
 WHERE cp.campaignId = 2413
 GROUP BY cpd.productId, DATE_FORMAT(cp.paymentDate, '%b-%Y')
 ORDER BY cp.paymentDate DESC, cpd.productId ASC

edit: Using DATE_FORMAT to format the date like you want.