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Editorial Team
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Asked: 2026-06-10T16:23:07+00:00

I am trying to write a query that will pull some product information AND

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I am trying to write a query that will pull some product information AND photos, if the product has any.

select
    prod.pID, prod.Manufacturer_Name, prod.pUPC, prod.pNum, prod.pPrice, prod.pSalesPrice, prod.pSalesDate, prod.pSalesEndDate, prod.pSale,
    GROUP_CONCAT(photoName) as photos
from
    ds_products as prod
    inner join ds_photos as pics on pics.objectID=prod.pID
where
   pics.photoFlag =2
group by 
   prod.pID

The problem with this is that products that do not have photos get left out of the result set. What do I need to add and/or change to allow for a product that doesn’t appear in the photos table to show up in the results?

Thanks

EDIT

I tried the LEFT JOIN instead of inner but get the same result set. If i run just:

select
    prod.pID, prod.Manufacturer_Name, prod.pUPC, prod.pNum, prod.pPrice, prod.pSalesPrice, prod.pSalesDate, prod.pSalesEndDate, prod.pSale
from
    ds_products as prod

I get about 600k results. The inner and or left join queries get about 190k results. Is there another way to do this?

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1 Answer

  1. Editorial Team

    Use outer join

    select
    prod.pID, prod.Manufacturer_Name, prod.pUPC, prod.pNum, prod.pPrice, prod.pSalesPrice, prod.pSalesDate, prod.pSalesEndDate, prod.pSale,
    GROUP_CONCAT(photoName) as photos
from
    ds_products as prod
    LEFT join ds_photos as pics on pics.objectID=prod.pID
where
   pics.photoFlag =2 OR pics.photoFlag is NULL
group by 
   prod.pID

    I have added a condition which check if photoFlag is null for the products which don’t have corresponding pics
    Here is working fiddle : http://sqlfiddle.com/#!2/c2a9c/1/0

    For more information: http://dev.mysql.com/doc/refman/5.0/en/outer-join-simplification.html

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