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  • Reflections on SQL Saturday #60 - Cleveland

    - by AaronBertrand
    Every time I attend a SQL Saturday , I leave with a rejuvenated and even further reinforced sense of community. Cleveland ( SQL Saturday #60 ) was by far no exception. Allen White ( blog | twitter ), Erin Stellato ( blog | twitter ), Cory Stevenson, Brian Davis ( twitter ), and all others involved put on a fantastic event that endured some crappy weather, parking problems, and significant delays and hardship for at least one speaker - sorry Grant! (Grant wrote about his experience .) I was able to...(read more)

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  • Recorded Webcast Available: Extend SCOM to Optimize SQL Server Performance Management

    - by KKline
    Join me and Eric Brown, Quest Software senior product manager for SQL Server monitoring tools, as we discuss the server health-check capabilities of Systems Center Operations Manager (SCOM) in this previously recorded webcast. We delve into techniques to maximize your SCOM investment as well as ways to complement it with deeper monitoring and diagnostics. You’ll walk away from this educational session with the skills to: Take full advantage of SCOM’s value for day-to-day SQL Server monitoring Extend...(read more)

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  • [New England] SQL Saturday 71 - April 2 - Boston Area

    - by Adam Machanic
    April in the Boston area means many things. The Boston Marathon, the beginning of baseball season, and -- hopefully -- a bit of a respite from the ridiculously cold and snowy winter we've been having. This April will mean one more thing: A full-day, free SQL Server event featuring 30 top-notch sessions . SQL Saturday 71 will be the third full-day event in the area in as many years, and is shaping up to be the best yet. For the past several months I've been working and planning in conjunction with...(read more)

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  • T-SQL User-Defined Functions: the good, the bad, and the ugly (part 2)

    - by Hugo Kornelis
    In a previous blog post , I demonstrated just how much you can hurt your performance by encapsulating expressions and computations in a user-defined function (UDF). I focused on scalar functions that didn’t include any data access. In this post, I will complete the discussion on scalar UDFs by covering the effect of data access in a scalar UDF. Note that, like the previous post, this all applies to T-SQL user-defined functions only. SQL Server also supports CLR user-defined functions (written in...(read more)

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  • SQL Server 2012 Service Pack 1 CTP4 is available

    - by AaronBertrand
    This morning the SQL Server team announced the release of Service Pack 1 CTP4 for SQL Server 2012. Back in July I talked about CTP3 and how the release contained BI features only; no fixes. The newer CTP does have fixes and other engine enhancements as well; there is even proper documentation in Books Online about the enhancements. The download page also lists them: http://www.microsoft.com/en-us/download/details.aspx?id=34700 The build # is 11.0.2845....(read more)

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  • Cumulative Update #8 for SQL Server 2008 SP3 is available

    - by AaronBertrand
    Today Microsoft has released a new cumulative update for SQL Server 2008 SP3. KB article: KB #2771833 There are 9 fixes listed at the time of writing The build number is 10.00.5828.00 Relevant for @@VERSION between 10.00.5500 and 10.00.5827 It seems clear that Service Pack 2 servicing has been discontinued. So there is even less reason to hold onto those old builds, and every reason to upgrade to Service Pack 3 . As usual, I'll post my standard disclaimer here: these updates are NOT for SQL Server...(read more)

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  • T-SQL bits - ROW_NUMBER

    - by MartinIsti
    About a month ago I found the SQLShare site which provides useful, clear tutorial videos of how to use some SQL functions, or how to fine tune a query. Their videos are roughly 3-5 minutes long and have proved to be very good for me with a strong BI background with less first-hand T-SQL experience. I decided to make notes of the ones I watched and found useful and instead of putting them into a word document somewhere locally I'll publish them on this blog so. These would be very simple and short...(read more)

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  • T-SQL User-Defined Functions: the good, the bad, and the ugly (part 3)

    - by Hugo Kornelis
    I showed why T-SQL scalar user-defined functions are bad for performance in two previous posts. In this post, I will show that CLR scalar user-defined functions are bad as well (though not always quite as bad as T-SQL scalar user-defined functions). I will admit that I had not really planned to cover CLR in this series. But shortly after publishing the first part , I received an email from Adam Machanic , which basically said that I should make clear that the information in that post does not apply...(read more)

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  • T-SQL User-Defined Functions: the good, the bad, and the ugly (part 2)

    - by Hugo Kornelis
    In a previous blog post , I demonstrated just how much you can hurt your performance by encapsulating expressions and computations in a user-defined function (UDF). I focused on scalar functions that didn’t include any data access. In this post, I will complete the discussion on scalar UDFs by covering the effect of data access in a scalar UDF. Note that, like the previous post, this all applies to T-SQL user-defined functions only. SQL Server also supports CLR user-defined functions (written in...(read more)

    Read the article

  • Reflections on SQL Saturday #60 - Cleveland

    - by AaronBertrand
    Every time I attend a SQL Saturday , I leave with a rejuvenated and even further reinforced sense of community. Cleveland ( SQL Saturday #60 ) was by far no exception. Allen White ( blog | twitter ), Erin Stellato ( blog | twitter ), Cory Stevenson, Brian Davis ( twitter ), and all others involved put on a fantastic event that endured some crappy weather, parking problems, and significant delays and hardship for at least one speaker - sorry Grant! (Grant wrote about his experience .) I was able to...(read more)

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  • How to transform vertical table into horizontal table?

    - by avivo
    Hello, I have one table Person: Id Name 1 Person1 2 Person2 3 Person3 And I have its child table Profile: Id PersonId FieldName Value 1 1 Firstname Alex 2 1 Lastname Balmer 3 1 Email [email protected] 4 1 Phone +1 2 30004000 And I want to get data from these two tables in one row like this: Id Name Firstname Lastname Email Phone 1 Person1 Alex Balmer [email protected] +1 2 30004000 What is the most optimized query to get these vertical (key, value) values in one row like this? Now I have a problem that I done four joins of child table to parent table because I need to get these four fields. Some optimization is for sure possible. I would like to be able to modify this query in easy way when I add new field (key,value). What is the best way to do this? To create some StoreProcedure? I would like to have strongly types in my DB layer (C#) and using LINQ (when programming) so it means when I add some new Key, Value pair in Profile table I would like to do minimal modifications in DB and C# if possible. Actually I am trying to get some best practices in this case.

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  • Cumulative Update #8 for SQL Server 2008 SP3 is available

    - by AaronBertrand
    Today Microsoft has released a new cumulative update for SQL Server 2008 SP3. KB article: KB #2771833 There are 9 fixes listed at the time of writing The build number is 10.00.5828.00 Relevant for @@VERSION between 10.00.5500 and 10.00.5827 It seems clear that Service Pack 2 servicing has been discontinued. So there is even less reason to hold onto those old builds, and every reason to upgrade to Service Pack 3 . As usual, I'll post my standard disclaimer here: these updates are NOT for SQL Server...(read more)

    Read the article

  • T-SQL User-Defined Functions: the good, the bad, and the ugly (part 3)

    - by Hugo Kornelis
    I showed why T-SQL scalar user-defined functions are bad for performance in two previous posts. In this post, I will show that CLR scalar user-defined functions are bad as well (though not always quite as bad as T-SQL scalar user-defined functions). I will admit that I had not really planned to cover CLR in this series. But shortly after publishing the first part , I received an email from Adam Machanic , which basically said that I should make clear that the information in that post does not apply...(read more)

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  • Stairway to T-SQL DML Level 5: The Mathematics of SQL: Part 2

    Joining tables is a crucial concept to understanding data relationships in a relational database. When you are working with your SQL Server data, you will often need to join tables to produce the results your application requires. Having a good understanding of set theory, and the mathematical operators available and how they are used to join tables will make it easier for you to retrieve the data you need from SQL Server.

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  • We’re looking got SQL People

    - by simonsabin
    We are growing our data team at Wonga. If you are working in the SQL Server space and would like to join the one the fastest growing tech companies in Europe then please get in touch ( http://sqlblogcasts.com/blogs/simons/contact.aspx ) We have positions for production DBAs, Data QA analysts and SQL generalists (with a BI tendency). We also have generalist production support roles   Wonga is currently 3rd in the Times Tech Track 100 having been 1st last year. Being in the top 3 for two years...(read more)

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  • SQL Server 2008 - Error starting service - model.mdf not found?!

    - by alex
    my SQL server 2008 was running fine. About an hour ago, it suddenly stopped - the MSSQLSERVER service had stopped I right clicked, clicked start, and it said the service had started, and stopped I looked in the event log and saw these two errors: 17207 : udopen: Operating system error 3(error not found) during the creation/opening of physical device C:\Program Files\Microsoft SQL Server\MSSQL\data\model.mdf. 17204 : FCB::Open failed: Could not open device C:\Program Files\Microsoft SQL Server\MSSQL\data\model.mdf for virtual device number (VDN) 1. The model.mdf db has NEVER been in that location - i specified drive F: to use for data / log during install. I checked the SQL Configuration Manager, to try and set startup params, but SQL Server is not listed as one of the services..... EDIT: I've now moved the db to where it was looking for: C:\Program Files\Microsoft SQL Server\MSSQL\data\ directory. Now if I start the service, it still does not work - i get this error message in the log: Could not find row in sysindexes for database ID 3, object ID 1, index ID 1. Run DBCC CHECKTABLE on sysindexes. Interestingly, i checked the error log - around the time users reported problems, there is this: 2010-01-08 17:11:26.44 spid51 Configuration option 'show advanced options' changed from 0 to 1. Run the RECONFIGURE statement to install. 2010-01-08 17:11:26.44 spid51 FILESTREAM: effective level = 0, configured level = 0, file system access share name = 'MSSQLSERVER'. 2010-01-08 17:11:26.44 spid51 Configuration option 'Agent XPs' changed from 1 to 0. Run the RECONFIGURE statement to install. 2010-01-08 17:11:26.44 spid51 FILESTREAM: effective level = 0, configured level = 0, file system access share name = 'MSSQLSERVER'. 2010-01-08 17:11:26.44 spid51 Configuration option 'show advanced options' changed from 1 to 0. Run the RECONFIGURE statement to install. 2010-01-08 17:11:26.44 spid51 FILESTREAM: effective level = 0, configured level = 0, file system access share name = 'MSSQLSERVER'. 2010-01-08 17:11:44.89 spid10s Service Broker manager has shut down. 2010-01-08 17:11:47.83 spid7s SQL Server is terminating in response to a 'stop' request from Service Control Manager. This is an informational message only. No user action is required. 2010-01-08 17:11:47.83 spid7s SQL Trace was stopped due to server shutdown. Trace ID = '1'. This is an informational message only; no user action is required.

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  • Linq Left Outer Join

    - by Neil
    I am new to LINQ and am trying to convert a SQL query to LINQ: SQL: left outer join PRODUCT_BEST_USE pbu on pbu.PRODUCT_GUID = @uProductId and pbu.BEST_USE_GUID = bu.BEST_USE_GUID LINQ: from PBU in PRODUCT_BEST_USE.Where(PBU=>PBU.PRODUCT_GUID == p.PRODUCT_GUID).DefaultIfEmpty() When I add and PBU.BEST_USE_GUID equals BU.BEST_USE_GUID, I get an error: "A query body must end with a select clause or a group clause" Here is the full Linq query: from p in PRODUCT join BU in BEST_USE on p.CATEGORY_GUID equals BU.CATEGORY_GUID from PBU in PRODUCT_BEST_USE.Where(PBU=>PBU.PRODUCT_GUID == p.PRODUCT_GUID).DefaultIfEmpty() and PBU.BEST_USE_GUID equals BU.BEST_USE_GUID where p.PRODUCT_GUID == new Guid("d317752b-581d-4f43-92fa-4a4af91009f5") select new { BU.NAME, PBU.PRODUCT_BEST_USE_GUID }

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  • Linq To Sql or classic ADO.net?

    - by Spyros
    I am asking my self many times before start writting a new app or data access library , should I use LinqToSql or classic ADO.net , I have used both and the development time I spend on building an app with Linq To sql is like the 1/3 compared to ADO.net. The only think I like using Linq to sql is that I dont have to design the domain objects Linq does that for me and saves me from spend my time on boring things :P But is Linq to sql suitable for large scale projects , is there an overhead that we can avoid when using ADO.net ?

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  • Future of Linq to Sql and Entity Framework

    - by ENES TAYLAN
    I work on a project and want to use an ORM. What should I use: Linq to Sql or Entity Framework? Linq to Sql provides more opportunities, as I see, for example support for enumeration types. However, also it is said that, Linq to Sql was for playing and learning for Linq and future strategy of Microsoft lies on Entity Framework. So which one should I use?

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  • Linq To Text Files

    - by j-t-s
    Hi All I have a Text File (Sorry, I'm not allowed to work on XML files :(), and it includes customer records. Each text file looks like: Account_ID: 98734BLAH9873 User Name: something_85 First Name: ILove Last Name: XML Age: 209 etc... And I need to be able to use LINQ to get the data from these text files and just store them in memory. I have seen many Linq to SQL, Linq to BLAH but nothing for Linq to Text. Can someone please help me out abit? Thank you

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  • Advancing Code Review and Unit Testing Practice

    - by Graviton
    As a team lead managing a group of developers with no experience ( and see no need) in code review and unit testing, how can you advance code review and unit testing practice? How are you going to create a way so that code review and unit testing to naturally fit into the developer's flow? One of the resistance of these two areas is that "we are always tight on dateline, so no time for code review and unit testing". Another resistance for code review is that we currently don't know how to do it. Should we review the code upon every check-in, or review the code at a specified date?

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  • What is the difference between these two LINQ statements?

    - by jamone
    I had the 1nd statement in my code and found it not giving an accurate count, it was returning 1 when the correct answer is 18. To try and debug the problem I broke it out creating the 2nd statement here and the count returns 18. I just don't see what the difference is between these two. It seems like the 1st is just more compact. I'm currently running these two statements back to back and I'm sure that the database isn't changing between the two. int count = (from s in surveysThisQuarter where s.FacilityID == facility.LocationID select s.Deficiencies).Count(); vs var tempSurveys = from s in surveysThisQuarter where s.FacilityID == facility.LocationID select s; int count = 0; foreach (Survey s in tempSurveys) count += s.Deficiencies.Count();

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  • Linq to SQL Strange SQL Translation

    - by Master Morality
    I have a simple query that is generating some odd SQL translations, which is blowing up my code when the object is saturated. from x in DataContext.MyEntities select new { IsTypeCDA = x.EntityType == "CDA" //x.EntityType is a string and EntityType.CDA is a const string... } I would expect this query should translate to: SELECT (CASE WHEN [t0].[EntityType] = @p1 THEN 1 ELSE 0 END) as [IsTypeCDA] ... Instead I get this : SELECT (CASE WHEN @p1 = [t0].[EntityType] THEN 1 WHEN NOT (@p1 = [t0].[EntityType]) THEN 0 ELSE NULL END) AS [IsTypeCDA] ... Since I'm saturating a POCO where IsTypeCDA is a bool, it blows up stating I can't assign null to bool. Any thoughts? Edit: fixed the property names so they make sense...

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