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  • Temporal Tables – Part 2 – Changing history

    After my post yesterday, I had planned to take a break for Independence Day holiday, but a commenter asked a question that piqued my interest. How might you edit history? Well, the answer is simple, but the process isn’t exactly simple. Basically, you have to turn off system versioning, update history, and reapply system versioning. Not difficult, ...
    Posted to Louis Davidson (Weblog) by drsql on June 30, 2015
  • Temporal Tables – Part 1 - Simple Single Table Example

    In my first entry in my series of posts on DB Design Book Topics, I want to start with a pretty interesting topic, Temporal Tables. It is a very cool new feature that takes something that used to be very painful (capturing history of changes to a table, allowing the user to see the data at a point in time), and makes it very easy. So if you have ...
    Posted to Louis Davidson (Weblog) by drsql on June 29, 2015
  • Time to Start Plotting My 2016 Database Design Book

    Note: A new version has been talked about for years, but it is not a guarantee. This post is my way of introducing the new features of SQL Server, and follow on posts will be code filled example of how the features will work. I am making no promises at this time, but when I can, I will. With the recent release of a CTP version of what is called ...
    Posted to Louis Davidson (Weblog) by drsql on June 16, 2015
  • Classic Music, Attractions, and Presentations: Presenting on Database Design at SQL Saturday Atlanta 2015

    This next two weeks are going to be awesome. May 11, I get to see the Who for probably the last time ever. Saturday I am speaking on Database Design at SQL Saturday in Atlanta, then heading to Disney World.  It rarely gets even close to this good for a two week span, and SQL Saturday is a big part of that. I love going to SQL ...
    Posted to Louis Davidson (Weblog) by drsql on May 8, 2015
  • Database Design: 3-State Bits

    I can hear you thinking, “Andy, you’re off your old rocker. There are only two states for bit values!” And you are correct. Almost. What if I’m storing a truly binary value – a value that possesses only two possible states – but there’s the possibility of a third state to indicate that I do not know which state applies. Consider this ...
    Posted to Andy Leonard (Weblog) by andyleonard on May 6, 2015
  • ICYMI: Partitioning Advice, Purging Data Bloat, and an example of TVF Misbehavior - SQL Server Performance

    Here are some oldies, but goodies that I recommend you read:Two Partitioning Peculiarities and Aggregates and PartitioningMost of us know that partitions are one of the best ways to scale very large databases or very large IO workloads.  However, there are risks, two of which are explored in detail by internals master Paul White ...
    Posted to Kevin Kline (Weblog) by KKline on March 30, 2015
  • ICYMI: Troubleshooting CPU, Logging Myths, Missing Indexes, and Query Tuning Examples

    Great Articles at SQLPerformance.comThere are so many good articles from this ICYMI article that it’s hard to know which are best to highlight in the limited space. So, I’ll be arbitrary and simply choose a few of my favorite entries as we look back:Troubleshooting SQL Server CPU Performance IssuesThis outstanding ...
    Posted to Kevin Kline (Weblog) by KKline on March 16, 2015
  • Off to Richmond for SQL Saturday

    I got the email prodding speakers to blog about our upcoming sessions, so I got myself up and started to write this blog. It has been such a long time since I have done much side SQL work (other than doing quite a bit of tech editing, along with doing some work for PASS leading up to speaker submissions), that my blog didn't even show up in the ...
    Posted to Louis Davidson (Weblog) by drsql on March 13, 2015
  • SQL Saturday Birmingham #328 Database Design Precon In One Week

    On *August 22, I will be doing my ''How to Design a Relational Database'' pre-conference session in Birmingham, Alabama. You can see the abstract here if you are interested, and you can sign up there too, naturally. At just $100, which includes a free ebook copy of my database design book, it is a great bargain and I totally promise it will ...
    Posted to Louis Davidson (Weblog) by drsql on August 14, 2014
  • How In-Memory Database Objects Affect Database Design: Uniqueness

    This part is part of an ongoing series of blogs I am writing while preparing to give a presentation based on the prefix of this blog's title. It is a work in progress as I explore the effects of the new in-memory model. I would love comments that tell me that I am wrong (especially if it turns out that I am!) The first issue that arose in my ...
    Posted to Louis Davidson (Weblog) by drsql on July 6, 2014
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