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  • SQL Server DML Triggers - Tips & Tricks - Part 3 ("Trigger debug")

    This is the third blog post in the series dedicated to the Tips and Tricks of DML Triggers development. The first and the second parts can be found here: SQL Server DML Triggers - Tips & Tricks - Part 1 (''Intro'' & ''Triggers activation order'') SQL Server DML Triggers - Tips & Tricks - Part 2 (''Thought to work on ...
    Posted to Sergio Govoni (Weblog) by Sergio Govoni on March 21, 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 Server DML Triggers - Tips & Tricks - Part 2 ("Thought to work on multiple rows")

    This is the second blog post in the series dedicated to the Tips and Tricks of DML Triggers development. The first part can be found here: SQL Server DML Triggers - Tips & Tricks - Part 1 (''Intro'' & ''Triggers activation order'').   Triggers must be thought to work on multiple rows One of the most frequent mistake I have seen ...
    Posted to Sergio Govoni (Weblog) by Sergio Govoni on March 5, 2015
  • SQL Server DML Triggers - Tips & Tricks - Part 1 ("Intro" & "Triggers activation order")

    This is the first blog post in a series of posts about Tips & Tricks of SQL Server DML Triggers. Introduction Triggers are often one of the main reason of quarrel between Developers and DBAs, between those who customize a database application and those who provides it. They are often the first database objects to be blamed when the ...
    Posted to Sergio Govoni (Weblog) by Sergio Govoni on December 29, 2014
  • Geek City: Lost Identity

    Way long ago, when Sybase first added the IDENTITY property, it took people quite a while to get the hang of using it. Along with being able to automatically generate sequential numbers for each row, we had to tune a configuration option with the geekiest of names: “Identity Burning Set Factor”.  And figuring out how to use this value seemed ...
    Posted to Kalen Delaney (Weblog) by Kalen Delaney on June 17, 2014
  • Unexpected SPID change

    A few time ago I had the opportunity to investigate about an unexpected SPID (Session Process ID) change. The inquiry began when a customer of ours starts to complain for locks, and lock time out error. These locks sometime were more frequent and sometimes not. To investigate about this issue, I have taken two SQL Profiler trace files ...
    Posted to Sergio Govoni (Weblog) by Sergio Govoni on April 3, 2014
  • Performance Tuning with SQL Server Dynamic Management Views

    From Red-Gate website you can download (for free) the ebook Performance Tuning with SQL Server Dynamic Management Views written by Louis Davidson (@drsql) and Tim Ford (@sqlagentman). DMVs are objects that publish information about the health state of a SQL Server instance. They allow you to monitor the heart of the system to diagnose ...
    Posted to Sergio Govoni (Weblog) by Sergio Govoni on March 14, 2014
  • Capturing query and IO statistics using Extended Events

    The commands SET STATISTICS TIME ON SET STATISTICS IO ON   return information about query executions and are very useful when doing performance tuning work as they inform how long a query took to execute and the amount of IO activity that occurred as a result of that query. These are very effective ...
    Posted to Jamie Thomson (Weblog) by jamiet on March 5, 2014
  • Building Your T-SQL Tool Kit: Window Function Fundamentals

    The session Building Your T-SQL Tool Kit: Window Function Fundamentals by Christina E. Leo (@christinaleo) has been published on channel SQLPASS TV. Abstract Have you pulled a script to identify duplicates from a blog post but couldn't quite get it to work because you weren't sure what that ROW_NUMBER() function was doing? Maybe you ...
    Posted to Sergio Govoni (Weblog) by Sergio Govoni on January 21, 2014
  • First release of my own personal T-SQL Code Library on github

    Like many (most???) T-SQL developers I keep a stash of useful code that I’ve garnered down the years because I know its all going to come in useful at some point in the future. It includes code I’ve written myself and also code that others have shared on their own blogs. For example my code library includes the following: vwdiskfileLatency – ...
    Posted to Jamie Thomson (Weblog) by jamiet on January 12, 2014
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