A Developer’s Guide to Dangerous Queries (Video)


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4 Comments. Leave new

  • Thanks for sharing Jeremiah. Great stuff!

    By the way, I think I’ve seen similar queries before from a product that will remain unnamed 😉

  • Donald Robichaud
    February 19, 2013 3:11 pm

    * Correlated Subqueries – fixed
    * Removed DISTINCT
    * Added alias in GROUP BY

    USE ContosoRetailDW;

    dd.DateDescription ,
    SUM(fs.SalesAmount) AS Sales,
    SUM(COALESCE(fs.DiscountAmount, 0)) AS Discount

    FROM dbo.FactSales AS fs
    JOIN dbo.DimDate AS dd
    ON fs.DateKey = dd.Datekey
    GROUP BY dd.DateDescription
    HAVING SUM(fs.SalesAmount) > AVG(fs.SalesAmount) ;

    • Jeremiah Peschka
      February 19, 2013 3:16 pm

      Thanks for the suggestion to remove the GROUP BY.

      I edited your comment to make it clear to the reader which changes you made.


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