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Data Warehousing, BI and Data Science | Vincent Rainardi's blog on DW, BI, Big Data and Machine Learning

Data Warehousing One or Two Dimensions Using a Data Warehouse for CRM A dimension with only one attribute Data Warehouse Data Modelling (SQLBits 4 Persentation) Storing Percentage Measure in the Fact Table Primary Key in Accumulating Snapshot Fact Tables Join Brings More Rows Normalised Data Warehouse (1) Normalised Data Warehouse (2) Disk Space in Data…

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Data Warehousing, BI and Data Science | Vincent Rainardi's blog on DW, BI, Big Data and Machine Learning | dwbi1.wordpress.com Reviews
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Data Warehousing One or Two Dimensions Using a Data Warehouse for CRM A dimension with only one attribute Data Warehouse Data Modelling (SQLBits 4 Persentation) Storing Percentage Measure in the Fact Table Primary Key in Accumulating Snapshot Fact Tables Join Brings More Rows Normalised Data Warehouse (1) Normalised Data Warehouse (2) Disk Space in Data…
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Data Warehousing, BI and Data Science | Vincent Rainardi's blog on DW, BI, Big Data and Machine Learning | dwbi1.wordpress.com Reviews

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Data Warehousing One or Two Dimensions Using a Data Warehouse for CRM A dimension with only one attribute Data Warehouse Data Modelling (SQLBits 4 Persentation) Storing Percentage Measure in the Fact Table Primary Key in Accumulating Snapshot Fact Tables Join Brings More Rows Normalised Data Warehouse (1) Normalised Data Warehouse (2) Disk Space in Data…

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Disk Space in Data Warehousing | Data Warehousing and Business Intelligence

https://dwbi1.wordpress.com/2010/03/24/disk-space-in-data-warehousing

Data Warehousing and Business Intelligence. Disk Space in Data Warehousing. Filed under: Data Warehousing. 8212; Vincent Rainardi @ 8:46 am. I don’t think I can keep it DW jargon free now. Note that in SQL Server we don’t have bitmap index like in Oracle hence more space is required for indexing to the same effect. Select something, something, sum(something). From table1 join table2 on … join table3 on …. Where … and … and … group by … having …. I hope the above points had made you aware about the disk s...

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Data type of “Is Current Flag” column | Data Warehousing and Business Intelligence

https://dwbi1.wordpress.com/2010/03/13/data-type-for-“is-current-flag”-column

Data Warehousing and Business Intelligence. Data type of Is Current Flag column. Filed under: Data Warehousing. 8212; Vincent Rainardi @ 1:00 pm. In data warehousing we have an Is Current Flag column in SCD type 2 dimension table. This flag indicates whether the row is the current version or not. But, in SQL Server, if you have 8 or less bit column in the table, it is stored as 1 byte. So if Is Current Flag is the only bit column in your dimension table, you don’t save space by going to bit data type.

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Join brings more rows | Data Warehousing and Business Intelligence

https://dwbi1.wordpress.com/2010/03/28/join-brings-more-rows

Data Warehousing and Business Intelligence. Join brings more rows. Filed under: Data Warehousing. 8212; Vincent Rainardi @ 12:59 pm. When populating a fact table from the source system we do a lookup on the dimension tables to get the dimension surrogate keys. We join the dimension tables to the fact stage table on the natural keys:. Select D1.SK, D2.SK. From fact stage table S. Left join dim1 D1 on S.D1NK = D1.NK. Left join dim2 D2 on S.D2NK = D2.NK. SK = Surrogate Key, NK = Natural Key). The column(s) ...

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SSAS DMV (Dynamic Management View) | Data Warehousing and Business Intelligence

https://dwbi1.wordpress.com/2010/01/01/ssas-dmv-dynamic-management-view

Data Warehousing and Business Intelligence. SSAS DMV (Dynamic Management View). Filed under: Analysis Services. 8212; Vincent Rainardi @ 12:16 am. What are SSAS DMVs? SSAS Dynamic Management Views are Analysis Services schema rowsets exposed as tables that we can query using T-SQL SELECT statement. For example, to query discover connections DMV, we can write:. Select * from $system.discover connections. DMVs are more convenient to use than schema rowsets because:. B) the output is a table rather than XML.

5

Comparing Excel 2007 and ProClarity | Data Warehousing and Business Intelligence

https://dwbi1.wordpress.com/2010/01/04/comparing-excel-2007-and-proclarity

Data Warehousing and Business Intelligence. Comparing Excel 2007 and ProClarity. Filed under: BI Tools. 8212; Vincent Rainardi @ 9:03 pm. I use Excel 2007 and ProClarity to browse SSAS cubes. This is what I experienced. In ProClarity you can put measures on the background so the user can pick which measure they want to use. In Excel 2007 you can’t; you can only put measures on the column or row. Note: after using ProClarity, if we use Excel 2007 again, Excel will open the correct page. In ProClarity you ...

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SSAS/MDX Concepts & Tools: MDX behavior in SQL Server 2008 R2 & Earlier Versions

http://ssasbysss.blogspot.com/2011/05/mdx-behavior-in-sql-server-2008-r2.html

SSAS/MDX Concepts and Tools. Created this blog to share my experience and understanding on Analysis Services and MDX. Wednesday, May 18, 2011. MDX behavior in SQL Server 2008 R2 and Earlier Versions. I have been working on Sql Server Analysis Services and MDX for quite a long period. And interestingly on day to day basis I get to understand new concepts, bugs, and some interesting features. Few days back,. Http:/ connect.microsoft.com/. Select [Measures].[Internet Sales Amount] on 0,. May 7, 2004 $17,992...

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SSAS Musings: Oktober 2010

http://ssas-musings.blogspot.com/2010_10_01_archive.html

MDX-Adventures from the Wildlife. Mittwoch, 20. Oktober 2010. Boyan Penev writes in his Blog about Currency Conversion in SSAS. He provides a lot of interesting links and includes also practical examples. His Blog is absolutly worth reading (and is now included into the link section of this page). Eingestellt von Martin Preiss. Alberto Ferrari - Blog. Boyan Penev - Blog. Chris Webb - Blog. Darren Gosbell - Blog. Greg Galloway - Blog. Marco Russo - Blog. Mosha Pasumansky - Blog. SQL Server News Blog.

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SSAS Musings: April 2010

http://ssas-musings.blogspot.com/2010_04_01_archive.html

MDX-Adventures from the Wildlife. Mittwoch, 14. April 2010. Theo Lachev explains in his Blog. Why the SQL Profiler does not tell you the truth about I/O waits in SSAS: it's "because the. Started/Finished reading data from the partition. Events include also the time spent in aggregating. Data and this time may be significant". He suggests to use the Xperf tool from the Windows Performance Toolkit instead and provides links to some short introductions that show how to use the tool. To tell us this.").

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SSAS/MDX Concepts & Tools: August 2011

http://ssasbysss.blogspot.com/2011_08_01_archive.html

SSAS/MDX Concepts and Tools. Created this blog to share my experience and understanding on Analysis Services and MDX. Tuesday, August 2, 2011. Remote Query (Linked Server) Connection Time-Out Issue and Solution. Today, I faced an issue while running a long MDX query in terms of execution time. I went through so many posts on this issue, but didn't get any answer. Below are the details:. Linked Server Connection: Query Timeout property under Server Options. None of them were successful attempt in my case.

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SSAS/MDX Concepts & Tools: MDX

http://ssasbysss.blogspot.com/p/mdx.html

SSAS/MDX Concepts and Tools. Created this blog to share my experience and understanding on Analysis Services and MDX. Here are some useful MDX expressions for specific requirements which we generally come across while working with SQL Server Analysis Services. I have used sample "Adventure Works" olap database for all the expressions. 1 MDX: To return Product Subcategories which has sales 20000 for every year. Measures].[Internet Sales Amount]}. Product].[Subcategory].[Subcategory],.

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SSAS Musings: November 2010

http://ssas-musings.blogspot.com/2010_11_01_archive.html

MDX-Adventures from the Wildlife. Freitag, 19. November 2010. Darren Gosbell advises not to use Implicit Recursion. Eingestellt von Martin Preiss. Alberto Ferrari - Blog. Boyan Penev - Blog. Chris Webb - Blog. Darren Gosbell - Blog. Greg Galloway - Blog. Marco Russo - Blog. Mosha Pasumansky - Blog. MS SQL Server Development Customer Advisory Team. SQL Server News Blog. Vincent Rainardi - Blog.

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MVP – Tomislav Piasevoli – BI Blog

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Business Intelligence on Microsoft platform. Tomislav Piasevoli – BI Blog. My 3rd Microsoft MVP award. Here’s just a short info that I have received the Microsoft MVP Award. Again, my third in a row. Naturally, I’m very happy about it :-). As always, stay tuned for interesting presentations, blog posts and/or magazine articles in the upcoming period. And thank you for following and appreciating my work! Posted by Tomislav Piasevoli. Microsoft MVP Award, again! Posted by Tomislav Piasevoli.

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SSAS Musings: Cube documentation with DMV data

http://ssas-musings.blogspot.com/2010/09/cube-documentation-with-dmv-data.html

MDX-Adventures from the Wildlife. Mittwoch, 29. September 2010. Cube documentation with DMV data. The FrogBlog shows how to generate a SSRS documentation for a cube by using DMVs via LinkedServer access:. Http:/ www.purplefrogsystems.com/blog/index.php/2010/09/olap-cube-documentation-in-ssrs-part-1/. Http:/ www.purplefrogsystems.com/blog/index.php/2010/09/olap-cube-documentation-in-ssrs-part-2/. Http:/ www.purplefrogsystems.com/blog/2010/09/olap-cube-documentation-in-ssrs-part-3/. Alberto Ferrari - Blog.

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SSAS Musings: März 2010

http://ssas-musings.blogspot.com/2010_03_01_archive.html

MDX-Adventures from the Wildlife. Donnerstag, 18. März 2010. Save your day with ProcessIncremental. Who claims not to have too long processing times in real-world analytic databases either is a lyer . In our current project, where we tried to setup a "ProcessUpdate" szenario, the complexity of dimension, partition changes and ProcessIndex calls had summed up to a period that was nearly as long as a full "Process" ( 2h for 5GB/2 years of business data). Dienstag, 16. März 2010. Montag, 8. März 2010. In SS...

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Hírek, újdonságok és tesztek az üzleti intelligencia és az adattárházak világából. Iratkozz fel az RSSre. Cloudera Impala, avagy a BigData egy nagy állatkert. T, egy új, gyorsabb, SQL szerű kódok végrehajtására jobban optimalizált hadoop (HDFS vagy HBase) alapokra épülő , nyílt forráskódú alkalmazást, egy elosztott adatbázis kezelő rendszert. Tovább is van, folytatom. A BO, a QV és a poligámia. Tovább is van, folytatom. De hová tünt a Sybase IQ? Tapasztalhattuk, hogy a HANA körüli felhajtás közben szép c...

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Data Warehousing, BI and Data Science | Vincent Rainardi's blog on DW, BI, Big Data and Machine Learning

Data Warehousing, BI and Data Science. Content of This Blog. One or Two Dimensions. Using a Data Warehouse for CRM. A dimension with only one attribute. Data Warehouse Data Modelling (SQLBits 4 Persentation). Storing Percentage Measure in the Fact Table. Primary Key in Accumulating Snapshot Fact Tables. Join Brings More Rows. Normalised Data Warehouse (1). Normalised Data Warehouse (2). Disk Space in Data Warehousing. Why a 400 GB Data Warehouse Requires 20 TB of Disks. Data type of Is Current Flag column.

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