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• Troubleshoot Database Concurrency in SQL Server with sp_locks

  sp_locks is a useful tool which can help a DBA in detecting and troubleshooting blocking and concurrency scenarios. This article demonstrates a worked example of using sp_locks to troubleshoot a database concurrency issue. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at…

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• Fun with SQL Server Profiler trace files and PowerShell

  Running Profiler traces against multiple servers becomes a painful process when it’s time to collate and filter all that data. It would be time-consuming, frustrating and messy if Laerte hadn’t written this handy PowerShell script (complete with examples) to help you out. Free trial of SQL Backup™“SQL Backup was able to cut down my backup…

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• Contiguous Time Periods

  It is always better, and more efficient, to maintain referential integrity by using constraints rather than triggers. Sometimes it is not at all obvious how to do this, and the history table, and other temporal data tables, presented problems for checking data that were difficult to solve with constraints. Suddenly, Alex Kuznetsov came up…

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• Five New Videos on ASP.NET MVC 2!

  Joe Stagner starts a new "ASP.NET MVC For the Rest of Us" video series with 3 videos showing how to write an MVC application, and Jon Galloway delivers quick hits on ASP.NET MVC 2 Areas and Render Action .

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• State Transition Constraints

  Data Validation in a database is a lot more complex than seeing if a string parameter really is an integer. A commercial world is full of complex rules for sequences of procedures, of fixed or variable lifespans, Warranties, commercial offers and bids. All this requires considerable subtlety to prevent bad data getting in, and if it…

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• L'IA au service des datacenters de Google, l'entreprise met sur pied une machine capable de construire des modèles prédictifs pour améliorer son PUE

  L'IA au service des datacenters de Google, l'entreprise met sur pied une machine capable de construire des modèles prédictifs pour améliorer son PUE Joe Kava, VP de la section responsable des data centers de Google, a expliqué que Mountain View a commencé à utiliser un réseau de neurones artificiels pour optimiser les opérations…

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• On Handling Dates in SQL

  The calendar is inherently complex by the very nature of the astronomy that underlies the year, and the conflicting historical conventions. The handling of dates in TSQL is even more complex because, when SQL Server was Sybase, it was forced by the lack of prevailing standards in SQL to create its own ways of processing and…

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• Windows Phone 8 : quatre nouveautés supplémentaires pour les développeurs dont l'arrivée du « In-app payment »

  Windows Phone 8 : quatre nouveautés supplémentaires pour les développeurs Dont l'arrivée du paiement In-App Developpez.com faisait hier la liste des nouveautés principales que va apporter la prochaine version de Windows Phone aux développeurs. Parmi celles-ci, la plus remarquée est certainement le support de C/C++ et de…

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• Painless management of a logging table in SQL Server

  Tables that log a record of what happens in an application can get very large, easpecially if they're growing by half a billion rows a day. You'll very soon need to devise a scheduled routine to remove old records, but the DELETE statement just isn't a realistic option with that volume of data. Hugo Kornelis explains a…

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• Windows Phone passe officiellement la barre symbolique des 100.000 applications, Microsoft remercie les développeurs

  Windows Phone passe officiellement la barre très symbolique des 100.000 applications Microsoft remercie les développeurs L'étape avait été annoncée par la presse américaine au début du mois, elle est cette fois-ci officielle. En marge de la présentation du prochain Windows Phone 8, Microsoft a annoncé que son Maketplace…

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• Stairway to SQL Server Agent: Step 1: Setup and Overview

  SQL Server Agent is a Microsoft Windows service that allows a DBA to automate administrative tasks. SQL Server Agent can run jobs, monitor SQL Server, and process alerts. The SQL Server Agent service must be running before any jobs scheduled to execute automatically can be run Free trial of SQL…

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• DevWeek & SQL Server DevCon 2011

  The 14th annual DevWeek conference takes place from 14-18 March 2011, at the Barbican Centre in central London, and once again incorporates two dedicated tracks on SQL Server, alongside seven concurrent tracks aimed at software developers. Free trial of SQL Backup™“SQL Backup was able to cut down my backup…

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• Matrix Math in SQL

  Relational Datbases have tables as data structures, not arrays. This makes it tricky and slow to do matrix operations, but it doesn't mean it is impossible to do. Joe gives the Celko Slant on how to go about doing Matrix Math in SQL. 12 essential tools for database professionalsThe SQL…

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• A first look at SQL Server 2012 Availability Group Wait Statistics

  If you are trouble-shooting an AlwaysOn Availability Group topology, a study of the wait statistics will give a pointer to many of the causes of problems. Although several wait types are documented, there is nothing like practical experiment to familiarize yourself with new wait stats, and Joe Sack…

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• Three New Videos on Building the TailSpin SpyWorks Sample Web Forms Application

  Joe Stagner extends the tutorials for the TailSpin SpyWorks sample Web Forms application with a new video series detailing the entire development process. The first 3 videos cover the initial steps of implementing a template, directory organization, and building a category menu.

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• SEQUENCE in SQL Server 2011

  SEQUENCE is a core new feature of SQL Server 2011 (Denali). It is a more performant, flexible alternative to the INDENTITY attribute. This article introduces sequence and demonstrates how to use it and its performance advantage. Free trial of SQL Backup™“SQL Backup was able to cut down my…

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• SQL VIEW Basics

  SQL Views are essential for the database developer. However, it is common to see them misued, or neglected. Joe Celko tackles an introduction to the subject, but there is something about the topic that makes it likely that even the experienced developer will find out something new from reading…

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• SQL View: Beyond the Basics

  Joe Celko delves into the main uses of views, explains how the WITH CHECK OPTION works, and demonstrates how the INSTEAD OF trigger can be used in those cases where views cannot be updatable. What are your servers really trying to tell you? Find out with new SQL Monitor…

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• Stairway to Database Design - STEP 1: Data Elements

  Before you start to think about your database schema or tables, you need to consider your data: The type of data it is, the scale you use for values. It needs to be unique, precise and unambiguous. Then you need to name it in such a way that it can be generally understood. Joe Celko…

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• Error message: do not have authority to access this function

  - by Ross

  Hi. I just reinstalled Windows on my computer after getting a virus. I worked with it for a while and everything worked as it should. I then used a backup of the computer that I had made a week or so earlier and copied the backup over my user folder. (That is, I took the folder…

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• Emails sent to outlook.com not being delivered

  - by imukcedup

  I'm having an issue that is a little strange. I have a cPanel webserver that I own and have root. I was testing out emailing and noticed some issues. When I send an email to outlook.com address the email sends ok but nothing is recieved at the outlook mailbox. I also dont…

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• How do I deliver mail for wildcard addresses to a particular user/alias/program?

  - by David M

  I need to configure sendmail so that mail delivered for wildcard addresses is accepted for delivery and then delivered to a user, alias, or directly to a script. I can rewrite the envelope/headers any number of ways, but I don't know how to accept the wildcard address when…

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• Must have local user to authenticate Samba to AD?

  - by Phil

  I've got a CentOS 5.3 server with Samba running. I've joined this server to my domain in the hopes of allowing AD users some access to my Samba shares. I've found that this works, but only as long as the AD username that I'm trying to authenticate with is also a local…

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• T-SQL Tuesday #33: Trick Shots: Undocumented, Underdocumented, and Unknown Conspiracies!

  - by Most Valuable Yak (Rob Volk)

  Mike Fal (b | t) is hosting this month's T-SQL Tuesday on Trick Shots.  I love this choice because I've been preoccupied with sneaky/tricky/evil SQL Server stuff for a long time and have been presenting on it for the past year.  Mike's directives were "Show us…

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• Getting HAPROXY to redirect http to https in users browser session

  - by Jon

  We are currently using a Internet cloud provider to host our SaaS platform. The platform consists of a Firewall - Cloud Provider SLB - - Apache Web Server - HAPROXY SLB - Liferay Platform We have had to use HAPROXY because of an issue with the cloud providers SLB…

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