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  • Denali Enhancement–Duplicate Key Error Message

    When I was editing my chapter on implementing a database, I noticed a really nice improvement in the error message I had from the previous edition of the book. Instead of just telling me that there was a value in my modification statement that duplicated an existing value (or multiple values affected by the statement), it told me the duplicated ...
    Posted to Louis Davidson (Weblog) by drsql on July 14, 2011
  • Debunking Kimball Effective Dates part 2 – Windowing Functions

    Reigniting the [SCDEndDate] debate In November 2009 I wrote a blog post entitled Debunking Kimball Effective Dates where I stated that I was against the Kimball-recommended practice of maintaining a StartDate & EndDate value for every record in a type 2 slowly changing dimension (SCD) table (i.e. the values highlighted in blue in the ...
    Posted to Jamie Thomson (Weblog) by jamiet on July 13, 2011
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