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• SQL University: Parallelism Week - Part 3, Settings and Options

  - by Adam Machanic

  Congratulations! You've made it back for the the third and final installment of Parallelism Week here at SQL University . So far we've covered the fundamentals of multitasking vs. parallel processing and delved into how parallel query plans actually work . Today we'll take a look at the settings and options that influence intra-query parallelism and discuss how best to set things up in various situations. Instance-Level Configuration Your database server probably has more than one logical processor....(read more)

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• SQL Server 2008 R2 still requires a trace flag for Lock Pages in Memory

  - by AaronBertrand

  Almost two years ago, I blogged that Lock Pages in Memory was finally available to Standard Edition customers (Enterprise Edition customers had long been deemed smart enough to not abuse this feature). In addition to applying a cumulative update (2005 SP3 CU4 or 2008 SP1 CU2), in order to take advantage of LPIM, you also had to enable trace flag 845. Since the trace flag isn't documented for SQL Server 2008 R2, several of us in the community assumed that it was no longer required (since it was introduced...(read more)

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• SQL Down Under podcast 60 with SQL Server MVP Adam Machanic

  - by Greg Low

  I managed to get another podcast posted over the weekend. Late last week, I managed to get a show recorded with Adam Machanic. Adam's always fascinating. In this show, he's talking about what he's found regarding increasing query performance using parallelism. Late in the show, he gives his thoughts on a number of topics related to the upcoming SQL Server 2014.Enjoy!The show is online now: http://www.sqldownunder.com/Podcasts 

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• SQL Server Boolean (bit datatype)

  - by Derek D.

  In SQL Server, boolean values can be represented using the bit datatype. Bit values differ from boolean values in that a bit can actually be one of three values 1, 0, or NULL; while booleans can only either be true or false. When assigning bits, it is best to use 1 or zero [...]

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• T-SQL Tuesday # 16 : This is not the aggregate you're looking for

  - by AaronBertrand

  This week, T-SQL Tuesday is being hosted by Jes Borland ( blog | twitter ), and the theme is " Aggregate Functions ." When people think of aggregates, they tend to think of MAX(), SUM() and COUNT(). And occasionally, less common functions such as AVG() and STDEV(). I thought I would write a quick post about a different type of aggregate: string concatenation. Even going back to my classic ASP days, one of the more common questions out in the community has been, "how do I turn a column into a comma-separated...(read more)

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• SQL University: Parallelism Week - Introduction

  - by Adam Machanic

  Welcome to Parallelism Week at SQL University . My name is Adam Machanic, and I'm your professor. Imagine having 8 brains, or 16, or 32. Imagine being able to break up complex thoughts and distribute them across your many brains, so that you could solve problems faster. Now quit imagining that, because you're human and you're stuck with only one brain, and you only get access to the entire thing if you're lucky enough to have avoided abusing too many recreational drugs. For your database server,...(read more)

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• This Year's SQL Christmas Card

  - by Mike C

  This year's Christmas Card is similar to last year's. I used the geometry data type again for a spatial data design. Just download the attachment, unzip the .SQL script and run it in SSMS. Then look at the Spatial Data preview tab for the result. Also don't forget to visit http://www.noradsanta.org/ if your kids want to track Santa. Merry Christmas, Happy Holidays and have a great new year!...(read more)

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• Survey: Do you write custom SQL CLR procedures/functions/etc

  - by James Luetkehoelter

  I'm quite curious because despite the great capabilities of writing CLR-based stored procedures to off-load those nasty operations TSQL isn't that great at (like iteration, or complex math), I'm continuing to see a wealth of SQL 2008 databases with complex stored procedures and functions which would make great candidates. The in-house skill to create the CLR code exists as well, but there is flat out resistance to use it. In one scenario I was told "Oh, iteration isn't a problem because we've trained...(read more)

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• June 2013 Cumulative Updates for SQL Server 2008 R2

  - by AaronBertrand

  Well, surely at least partly in response to the CU6 mess I reported earlier today , and partly because they were due, Microsoft has released new cumulative updates that contain - among other things - updated code that avoids the symptom introduced with earlier updates (though this regression fix doesn't seem to appear in the KB articles - unless by "corruption" they meant ridiculous size increase). SQL Server 2008 R2 Service Pack 1 Cumulative Update # 13 KB Article: KB #2855792 5 fixes listed at...(read more)

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• T-SQL Tuesday #006: LOB Data

  - by Adam Machanic

  Just a quick note for those of you who may not have seen Michael Coles's post (and a reminder for the rest of you): The topic of this month's T-SQL Tuesday is LOB data . Get your posts ready; next Tuesday we go big! Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!...(read more)

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• SSIS Design Patterns Training in London 8-11 Sep!

  - by andyleonard

  A few seats remain for my course SQL Server Integration Services 2012 Design Patterns to be delivered in London 8-11 Sep 2014. Register today to learn more about: New features in SSIS 2012 and 2014 Advanced patterns for loading data warehouses Error handling The (new) Project Deployment Model Scripting in SSIS The (new) SSIS Catalog Designing custom SSIS tasks Executing, managing, monitoring, and administering SSIS in the enterprise Business Intelligence Markup Language (Biml) BimlScript ETL Instrumentation...(read more)

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• T-SQL User-Defined Functions: the good, the bad, and the ugly (part 4)

  - by Hugo Kornelis

  Scalar user-defined functions are bad for performance. I already showed that for T-SQL scalar user-defined functions without and with data access, and for most CLR scalar user-defined functions without data access , and in this blog post I will show that CLR scalar user-defined functions with data access fit into that picture. First attempt Sticking to my simplistic example of finding the triple of an integer value by reading it from a pre-populated lookup table and following the standard recommendations...(read more)

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• Microsoft SQL Server 2008 R2 Administration Cookbook

  - by ssqa.net

  Its one year on my first book released, keeping aside the financial gains from this book I'm more happy to achieve one of the important goals from my career. This is something big in my life to announce, it gives immensive pleasure and happiness to share about my first book (hard paper) and eBook release, titled : Microsoft SQL Server 2008 R2 Administration Cookbook is released and out now. share my experience and task based real-world best practices in a cookbook style. My thanks to the technical...(read more)

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• SQL Server Cast

  - by Derek Dieter

  The SQL Server cast function is the easiest data type conversion function to be used compared to the CONVERT function. It takes only one parameter followed by the AS clause to convert a specified value. A quick example is the following:SELECT UserID_String = CAST(UserID AS varchar(50)) FROM dbo.UserThis example will convert the integer to a character value. [...]

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• T-SQL Tuesday: Aggregations in SSIS

  - by andyleonard

  Introduction Jes Borland ( Blog | @grrl_geek ) is hosting this month's T-SQL Tuesday - started by SQLBlog's own Adam Machanic ( Blog | @AdamMachanic ) - and it is about aggregation. I thought I'd show a couple ways to do aggregation using SSIS. The Aggregate Transformation in SSIS The Aggregate transform in SSIS is fast . I built an SSIS package (AggregateScripts.dtsx) with two Data Flow Tasks (Using the Aggregate Transform and Using a Script Component). Using the Aggregate Transform looks like this:...(read more)

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• SQL Server Begin Try

  - by Derek Dieter

  The try catch methodology of programming is a great innovation for SQL 2005+. The first question you should ask yourself before using Try/Catch should be “why?”. Why am I going to use Try/Catch? Personally, I have found a few uses, however I must say I do fall into the category of not [...]

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• SQL Server 2012 - Upgrade Whitepaper

  - by JustinL

  Just a short note to mention Microsoft have released the Technical Reference Guide for upgrading to SQL Server 2012. The paper is available for download here: http://tinyurl.com/84xm5b4 There's some interesting details on approaches to upgrade, including features such as high availability, full-text search, service broker and other components (SSIS, SSAS, SSRS). Additionally, there's a (fairly) recent initiative to organise and present TechNet content more easily, there's some useful content (with interesting presentation) at the link below: http://technet.microsoft.com/en-us/library/hh393545.aspx Good luck planning your upgrades, Regards, Justin

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• T-SQL Tuesday #14: Resolutions

  - by AaronBertrand

  This month, T-SQL Tuesday is being hosted by freshly minted MVP Jen McCown ( blog | twitter ), and her topic is " Resolutions! " I already gave a rough sort of overview on my goals for 2011 , but I thought I would be able to dig a little deeper with enough relevance to participate. So with that in mind, and with a goal of not setting the bar too high, here are a few of the resolutions I hope to achieve in 2011: To become better at PowerShell Not just because all the cool kids are doing it, but because...(read more)

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• SQL Saturday #146 : Nashua, NH

  - by AaronBertrand

  Today was SQL Saturday #146, put on by Mike Walsh, Jack Corbett, and a host of other volunteers and organizers. Scott and I missed the speaker dinner last night, but we headed up from Rhode Island at 6:00 AM and made a good day of it. We had lots of great conversations with both existing friends and potential customers. After lunch I participated in a panel discussion with Joey D'Antoni and Andrew Kelly, led my Mike. We basically talked about various things DBAs are responsible for - and ultimately...(read more)

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• SQL Server Connections Fall 2011 - Demos

  - by Adam Machanic

  Today is the last day of the annual SQL Server Connections show in Vegas, and I've just completed my third and final talk. (Now off to find a frosty beverage or two.) This year I did three sessions: SQL302: Parallelism and Performance: Are You Getting Full Return on Your CPU Investment? Over the past five years, multi-core processors have made the jump from semi-obscure to commonplace in the data center. While servers with 16, 32, or even 64 cores were once an out-of-reach choice for all except the...(read more)

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• DAX editor for SQL Server

  - by Davide Mauri

  One of the major criticism to DAX is the lack of a decent editor and more in general of a dedicated IDE, like the one we have for T-SQL or MDX. Well, this is no more true. On Codeplex a very interesting an promising Visual Studio 2010 extension has been released by the beginning of November 2011: http://daxeditor.codeplex.com/ Intellisense, Syntax Highlighting and all the typical features offered by Visual Studio are available also for DAX. Right now you have to download the source code and compile it, and that’s it!

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• SQL 2012 - MySemanticSearch Demo with Tag Clouds

  - by sqlartist

  Excellent demonstration of the new SQL Server 2012 Semantic Search feature available at http://mysemanticsearch.codeplex.com Just tried it out on a large Business Intelligence related Microsoft Word collection and also the health related DMOZ collection of html files discussed in my previous posts. I have included some screenshots below of each document collection. I have realised that the Tag Cloud may need to be a bit more configurable based on the results of any search term. Business Intelligence...(read more)

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• Two bugs you should be aware of

  - by AaronBertrand

  In the past 24 hours I have come across two bugs that can be quite problematic in certain environments. LPIM issue with SetFileIoOverlappedRange Last night the CSS team posted a blog entry detailing a potential issue with Lock Pages in Memory and Windows' SetFileIoOverlappedRange API. I tweeted about it at the time, but thought it could use a little more treatment. The potential symptoms can vary, but include the following (as quoted from the blog post): Wide ranging in SQL from invalid write location,...(read more)

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• Speaking at SQL Saturday #39 in NYC!

  - by andyleonard

  I am honored to present Applied SSIS Design Patterns and Introduction to Incremental Loads at SQL Saturday #39 in New York City! If you're there and you read this blog, be sure to stop by and introduce yourself! :{> Andy Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!...(read more)

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• SQL Server For Each Row Next

  - by Derek Dieter

  It is difficult for me to write this particular article and I’ll tell you why. If you don’t care then just skip down to the example, but here goes anyway. It is very rare that you should have to perform looping in SQL. There are certain situations that do require it, and [...]

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