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  • Geek City: Preparing for the SQL Server Master Exam

    - by Kalen Delaney
    I was amazed at the results when I just did a search of SQLBlog, and realized no one had really blogged here about the changes to the Microsoft Certified Master (MCM) program. Greg Low described the MCM program when he decided to pursue the MCM at the end of 2008, but two years later, at the end of 2010, Microsoft completely changed the requirements. Microsoft published the new requirements here . The three week intensive course is no longer required, but that doesn't mean you can just buy an exam...(read more)

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  • What are events SQL profiler eventclass numbers 65527,65528,65533,65534

    - by simonsabin
    I’ve been trying to use RML to process some files and couldn’t figure out why the numbers where all so much smaller than they should be. I then found a line in the RML output “Found [TRACE_STOP] event indicating the end of the trace files” This causes RML to stop processing further data, oh. In my case I had stopped the trace to add some error events because the client was experiencing errors. How do I get RML to process all the other data I wondered. This lead me to the eventclasses in the trace...(read more)

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  • Testing install procedure of a program requiring administrative privileges

    - by Lucas Meijer
    I'm trying to write automated test, to ensure that the installer for my program works okay. The program can be installed for all users (requires admin privs), or for current user (does not require admin privs). The program can also autoupdate itself, which in some cases requires admin privileges, and in some cases doesn't. I'm looking for a way where I can have an automated test click "Yes, Allow" on the UAC dialogs, so I can write tests for all different scenarios, on many different operating systems, so that I can be confident when I make changes to the installer that I didn't break anything. Obviously, the installer process itself cannot do this. However, I control the complete machine, and could easily start some sort of daemon process with administrative rights, that the testprogram could make a socket connection to, to request it to "please click ok on the UAC now".

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  • DAL Layer : EF 4.0 or Normal Data access layer with Stored Procedure

    - by Harryboy
    Hello Experts, Application : I am working on one mid-large size application which will be used as a product, we need to decide on our DAL layer. Application UI is in Silverlight and DAL layer is going to be behind service layer. We are also moving ahead with domain model, so our DB tables and domain classes are not having same structure. So patterns like Data Mapper and Repository will definitely come into picture. I need to design DAL Layer considering below mentioned factors in priority manner Speed of Development with above average performance Maintenance Future support and stability of the technology Performance Limitation : 1) As we need to strictly go ahead with microsoft, we can not use NHibernate or any other ORM except EF 4.0 2) We can use any code generation tool (Should be Open source or very cheap) but it should only generate code in .Net, so there would not be any licensing issue on per copy basis. Questions I read so many articles about EF 4.0, on outset it looks like that it is still lacking in features from NHibernate but it is considerably better then EF 1.0 So, Do you people feel that we should go ahead with EF 4.0 or we should stick to ADO .Net and use any code geneartion tool like code smith or any other you feel best Also i need to answer questions like what time it will take to port application from EF 4.0 to ADO .Net if in future we stuck up with EF 4.0 for some features or we are having serious performance issue. In reverse case if we go ahead and choose ADO .Net then what time it will take to swith to EF 4.0 Lastly..as i was going through the article i found the code only approach (with POCO classes) seems to be best suited for our requirement as switching is really easy from one technology to other. Please share your thoughts on the same and please guide on the above questions

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  • This 24 Hours of PASS was "Different"

    - by RickHeiges
    Last week, the latest iteration of "24 Hours of PASS" was held. It was "Different" for me. Why? Because I was not an active participant on the days of the event other than being an attendee. I was involved in some aspects of the planning for the event when deciding the theme and format, etc. I was on many calls and email threads for the planning of this event. I did the moderator/speaker training a few weeks prior to the event. But on the days that the event was actually held, I was not on pins and...(read more)

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  • How to calculate the covariance in T-SQL

    - by Peter Larsson
    DECLARE @Sample TABLE         (             x INT NOT NULL,             y INT NOT NULL         ) INSERT  @Sample VALUES  (3, 9),         (2, 7),         (4, 12),         (5, 15),         (6, 17) ;WITH cteSource(x, xAvg, y, yAvg, n) AS (         SELECT  1E * x,                 AVG(1E * x) OVER (PARTITION BY (SELECT NULL)),                 1E * y,                 AVG(1E * y) OVER (PARTITION BY (SELECT NULL)),                 COUNT(*) OVER (PARTITION BY (SELECT NULL))         FROM    @Sample ) SELECT  SUM((x - xAvg) *(y - yAvg)) / MAX(n) AS [COVAR(x,y)] FROM    cteSource

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  • Speaking at Atlanta.MDF on March 12

    - by RickHeiges
    I am fortunate enough to be speaking to a user group with a really cool name - Atlanta.MDF (Microsoft Database Forum). Although I visit Atlanta often, it usually involves running from one councourse to another and rarely do I get the chance to visit the user group. I have made it to the user group on several occassions in the past, but it has been several years. This will be my first presentation to the group. I will be speaking about Database Consolidation - something I have been doing for years....(read more)

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  • Data Education: Great Classes Coming to a City Near You

    - by Adam Machanic
    In case you haven't noticed, Data Education (the training company I started a couple of years ago) has expanded beyond the US northeast; we're currently offering courses with top trainers in both St. Louis and Chicago , as well as the Boston area. The courses are starting to fill up fast—not surprising when you consider we’re talking about experienced instructors like Kalen Delaney , Rob Farley , and Allan Hirt —but we have still have some room. We’re very excited about bringing the highest quality...(read more)

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  • Reproducing a Conversion Deadlock

    - by Alexander Kuznetsov
    Even if two processes compete on only one resource, they still can embrace in a deadlock. The following scripts reproduce such a scenario. In one tab, run this: CREATE TABLE dbo.Test ( i INT ) ; GO INSERT INTO dbo.Test ( i ) VALUES ( 1 ) ; GO SET TRANSACTION ISOLATION LEVEL SERIALIZABLE ; BEGIN TRAN SELECT i FROM dbo.Test ; --UPDATE dbo.Test SET i=2 ; After this script has completed, we have an outstanding transaction holding a shared lock. In another tab, let us have that another connection have...(read more)

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  • Using v-table thunks to chain procedure calls

    - by Alien01
    I was reading some articles on net regarding Vtable thunks and I read somewhere that thunks can be used to hook /chain procedures calls. Is it achievable? Does anyone know how that works , also I am not able to find good resource explaining thunks. Any suggestions for that?

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  • OT: March Mdness 2011

    - by RickHeiges
    This past fall, I decided to take a break from Fantasy Football. Did I miss it? Yes to some extent. Fantasy Football can really eat up a lot of time. But - I still love March Madness (NCAA Men's Basketball Tourney). It doesn't take much time to pick out teams. Since you can't make any changes after the deadline and the computer keeps track of scoring/scenarios/etc, it is a fun thing that really takes a little time and can help you enjoy the games a bit more. Let's see how good you are at picking...(read more)

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  • Back from PASS Europe 2010

    - by Davide Mauri
    PASS Europe 2010 is finished and I’m now finally back at home and will stay here for a while. I would like to thanks all the people who has come to my sessions for all their feedback, especially for the “Adaptive BI” session! Slides and demos should be available for download from the PASS European Conference website in a couple of days. Meanwhile if you want to rate my session online, you can do it here: Adaptive BI http://speakerrate.com/talks/3136-adaptive-bi-best-practices Blazing Fast Queries http://speakerrate.com/talks/3135-blazing-fast-queries-when-indexes-are-not-enough Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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  • Yet another use of OUTER APPLY in defensive programming

    - by Alexander Kuznetsov
    When a SELECT is used to populate variables from a subquery, it fails to change them if the subquery returns nothing - and that can lead to subtle bugs. We shall use OUTER APPLY to eliminate this problem. Prerequisites All we need is the following mock function that imitates a subquery: CREATE FUNCTION dbo.BoxById ( @BoxId INT ) RETURNS TABLE AS RETURN ( SELECT CAST ( 1 AS INT ) AS [Length] , CAST ( 2 AS INT ) AS [Width] , CAST ( 3 AS INT ) AS [Height] WHERE @BoxId = 1 ) ; Let us assume that this...(read more)

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  • Slow in the Application but Fast in SQL Server Management Studio - from Erland

    - by Greg Low
    Our MVP buddy Erland Sommarskog doesn't post articles that often but when he does, you should read them. His latest post is here: http://www.sommarskog.se/query-plan-mysteries.html It talks about why a query might be slow when sent from an application but fast when you execute it in SSMS. But it covers way more than that. There is a great deal of good info on how queries are executed and query plans generated. Highly recommended!...(read more)

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  • Server 2008R2 in Extra Small Windows Azure Instance?

    - by Shawn Eary
    Windows Azure hosting for an Extra Small (XS) Windows VM seems to come out to be about $10 a month right now. I think this XS instance gives you the equivalent of a 1 GHZ CPU with 768MB of RAM. I think the minimum requirements for Server 2008 is 1GHZ CPU with 512MB of RAM. Also, I think the minimum requirements for SQL Server Express is 1GHZ CPU with 256 MB of RAM and that the minimum requirements for Team Foundation Server Express 11 Beta is 2.2 GHZ CPU with 1 Gig of RAM (this 2.2 GHZ part could be a problem for my 1 GHZ XS VM...). Given the performance of the XS Azure instance, would I be able to install: a very basic MVC web site; a free instance of SQL Server Express; a free single user instance of Team Foundation Server Express 11 Beta and run the XS VM instance without serious crashing? I know there are other Shared WebHost providers that can provide these features for me, but those hosting providers have the following disadvantages: They sometimes cost a lot of money after all of the "addons" are in place They probably don't provide the level of security and employee integrity that Microsoft can provide They don't provide the total control that an Azure VM seems to provide

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  • StreamInsight on the Brain - can you help?

    - by sqlartist
    I just came across this guy who is once again in the news as the world's first cyborg. I read all about this research some years back when he implanted a chip into his arm to allow him to open doors in his research lab. Now, without really advancing the research he is claiming that a virus could be implanted onto these implanted devices. Captain Cyborg sidekick implants virus-infected chip - http://www.theregister.co.uk/2010/05/26/captain_cyborg_cyberfud/ This is of interest to me as I actually...(read more)

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  • Powershell, SMO and Database Files

    - by dbaduck
    In response to some questions about renaming a physical file for a database, I have 2 versions of Powershell scripts that do this for you, including taking the database offline and then online to make the physical change match the meta-data. First, there is an article about this at http://msdn.microsoft.com/en-us/library/ms345483.aspx . This explains that you start by setting the database offline, then alter the database and modify the filename then set it back online. This particular article does...(read more)

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  • Regular Expression TCL using procedure

    - by user329763
    Hey everybody, I am a novice TCL programmer.Here I go My 1st post with stackoverflow forum. I would like to write a regular expression that matches any & only the strings starts with character A and ends with B. Whatever the characters coming inbetween should be displayed. For instance AXIOMB as an input from the user which starts with A & end with character B. Here is my try regexp { (^A([C-Z]+)B$)} Thank you

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  • Where is cck "number of values" data stored?

    - by calebthorne
    I have a cck field that needs to allow a different number of values depending on the role of the currently logged in user. I'd like to find where the "number of values" data is stored for a cck field so that it can be dynamically changed when the node edit form is displayed.

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