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  4. I need help with sequel query with INNER/OUTER JOIN

I need help with sequel query with INNER/OUTER JOIN

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  • H Offline
    H Offline
    hurrem
    wrote on last edited by
    #1

    Hi, Here is the similar query, that I need: SELECT News.NewsID, News.Headline, Images.ImageID FROM News INNER JOIN Images ON News.NewsID = Images.NewsID WHERE (News.Enabled = @Enabled) AND (Images.Favourite = @fave) But this gives only those headlines that have there images, but I need all the headlines, and if they have images, then to get the favorite imageID, because they can have more than one image and only one of them is favorite. thx

    C 1 Reply Last reply
    0
    • H hurrem

      Hi, Here is the similar query, that I need: SELECT News.NewsID, News.Headline, Images.ImageID FROM News INNER JOIN Images ON News.NewsID = Images.NewsID WHERE (News.Enabled = @Enabled) AND (Images.Favourite = @fave) But this gives only those headlines that have there images, but I need all the headlines, and if they have images, then to get the favorite imageID, because they can have more than one image and only one of them is favorite. thx

      C Offline
      C Offline
      Christian Graus
      wrote on last edited by
      #2

      Do an outer join, so you get the columns you want, plus those where the image doesn't exist.

      Christian Graus - Microsoft MVP - C++ "I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

      H 1 Reply Last reply
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      • C Christian Graus

        Do an outer join, so you get the columns you want, plus those where the image doesn't exist.

        Christian Graus - Microsoft MVP - C++ "I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

        H Offline
        H Offline
        hurrem
        wrote on last edited by
        #3

        I tried all kinds of outer join (right, left, full), but it is still gives me only those columns that are both enabled and have images, but I also need those that don't have images, it should give me NULLs, if there is no image on images table. thank you

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