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  • Data Mining Algorithms – K-Means Clustering

    Hierarchical clustering could be very useful because it is easy to see the optimal number of clusters in a dendrogram and because the dendrogram visualizes the clusters and the process of building of that clusters. However, hierarchical methods don’t scale well. Just imagine how cluttered a dendrogram would be if 10,000 cases would be shown on ...
    Posted to Dejan Sarka (Weblog) by Dejan Sarka on April 17, 2015
  • Data Mining Algorithms – Hierarchical Clustering

    Clustering is the process of grouping the data into classes or clusters so that objects within a cluster have high similarity in comparison to one another, but are very dissimilar to objects in other clusters. Dissimilarities are assessed based on the attribute values describing the objects. There are a large number of clustering algorithms. The ...
    Posted to Dejan Sarka (Weblog) by Dejan Sarka on March 28, 2015
  • Data Mining Algorithms – Association Rules

    The Association Rules algorithm is specifically designed for use in market basket analyses. This knowledge can additionally help in identifying cross-selling opportunities and in arranging attractive packages of products. This is the most popular algorithm used in web sales. You can even include additional discrete input variables and predict ...
    Posted to Dejan Sarka (Weblog) by Dejan Sarka on March 10, 2015
  • Data Mining Algorithms – an Introduction

    Data mining is the most advanced part of business intelligence. With statistical and other mathematical algorithms, you can automatically discover patterns and rules in your data that are hard to notice with on-line analytical processing and reporting. However, you need to thoroughly understand how the data mining algorithms work in order to ...
    Posted to Dejan Sarka (Weblog) by Dejan Sarka on February 19, 2015
  • A Biml Case Study

    Business Intelligence Markup Language (Biml) is a SQL Server Integration Services (SSIS) design patterns engine. A Story of Productivity A while back I was contacted by a client experiencing a familiar issue. The Production SQL Server instance was experiencing performance issues due to conflicts between customers and enterprise reporting needs. ...
    Posted to Andy Leonard (Weblog) by andyleonard on November 26, 2014
  • PASS Summit 2014 Pre-Con Preview: Davide Mauri

    If you’re into Data Warehousing, you may be interested in attending to the workshop I’ll deliver at PASS Summit 2014 in Seattle on November 4th. The workshop is entirely dedicated to explaining why and how a *successful* Data Warehouse can be thought, designed, architected, ...
    Posted to Davide Mauri (Weblog) by manowar on October 8, 2014
  • PASS SQL Saturday #356 Slovenia Pre-Conference Seminars

    I am proud and glad I can announce two top pre-conference seminars at the PASS SQL Saturday #356 Slovenia conference. The speakers and the seminars titles are: Stacia Misner - Power Up Your Data with Excel and Power BI Kevin Boles - Tune Like A Guru! Both seminars will take place on Friday, December 12th, in the classrooms of our sponsor ...
    Posted to Dejan Sarka (Weblog) by Dejan Sarka on September 29, 2014
  • 24 Hours of PASS (September 2014): Recordings Now Available!

    Sessions of the event 24 Hours of PASS: Summit Preview Edition (which was held on last September 9th) were recorded and now they are available for online streaming! If you have missed one session in particular or the entire event, you can view it or review your preferred sessions; you can find all details here. What could you aspect from ...
    Posted to Sergio Govoni (Weblog) by Sergio Govoni on September 24, 2014
  • On Agile Data Warehousing

    In the last month, I’ve been working on the slide deck of my Agile Data Warehousing workshop. In order to give to it additional value that goes beyond the pure technical aspects, and since now the “Agile” approach is becoming more and more mainstream also (and finally!) on BI, I did a small research to check what one can find on the web regarding ...
    Posted to Davide Mauri (Weblog) by manowar on August 28, 2014
  • SSIS Design Patterns Training in London 8-11 Sep!

    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 ...
    Posted to Andy Leonard (Weblog) by andyleonard on August 16, 2014
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