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Klaus Aschenbrenner

Klaus Aschenbrenner provides independent SQL Server Consulting Services across Europe and the US. Klaus works with the .NET Framework and especially with the SQL Server 2005/2008 from the very beginnings. In the years 2004 - 2005 Klaus was entitled with the MVP award from Microsoft for his tremendous support in the .NET Community. Klaus has also written the book Pro SQL Server 2008 Service Broker which was published by Apress in the Summer of 2008. Further information about Klaus you can find on his homepage at http://www.SQLpassion.at. He also twitters at http://twitter.com/Aschenbrenner.

Archives: August 2010

Unique and non-unique non-clustered indexes on a unique clustered index

In the last weblog post I have talked about the difference of unique and non-unique clustered indexes. As you have seen SQL Server uses an internal overhead of 4 bytes (the so-called uniquifier) to make non-unique clustered index rows unique. Today I want to work out the difference between unique… Read more

1 comments, 5,526 reads

Posted in Klaus Aschenbrenner on 31 August 2010

Unique/Non-Unique Clustered Indexes

In the last blog post I have talked about unique/non-unique clustered indexes on a heap table. A table without a clustered index is called a heap table in SQL Server. When you define a clustered index on such a table, the table data gets structured and is therefore referred… Read more

5 comments, 3,746 reads

Posted in Klaus Aschenbrenner on 19 August 2010

Unique and non-unique SQL Server indexes on a heap table

In the upcoming weblog postings I want to work out the differences between unique and non-unique indexes in SQL Server. I assume that you already know the concepts about clustered- and non clustered indexes and how they are used in SQL Server.

In the past I've done a lot of… Read more

0 comments, 1,749 reads

Posted in Klaus Aschenbrenner on 18 August 2010