A type of index mostly used in SQL-Server, which aligns the data of a table with the index.

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Moving Clustered Index to new filegroup results in excessive filegrowth

I've Moved the clustered index on large tables to new filegroups to defrag, compress, and to recover space more easily from the original "primary" filegroup. Problem: A 315GB compressed Clustered ...
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SQL Server 2008 R2 clustered index issue

Last week, we came up with a strange issue on Clustered index. We are using SQL Server 2008 R2 in our organization. A stored procedure is written for our application which contains a cursor in it. ...
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Why does removing a RID by creating a clustered index lose parallelism and slow down execution by 2X

If I remove a RID lookup by replacing 2 non-clustered indices (non unique) with 2 identical clustered indicies (non-unique) where there weren't any before, why does this query slow down by a factor ...
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How to speed up query on table with millions of rows

The Issue: I'm working on a big table that consists about 37mln rows. Data include measurements of many devices made in certain time e.g. '2013-09-24 10:45:50'. Each day all of those devices are ...
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Howto improve performance for these queries, why is my indexed view making it worse for most of them and how can I change that?

for the record, this is a rewrite of the following question (you do not have to read that because I include all important data here) Howto improve performance for queries against table without primary ...
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is it good to use combined primary key for MySQL InnoDB clustered index?

I'm trying to build a aggregated reader website of multiple forums. Because most queries are likely to be within same time periods for written_time column, I'm thinking about taking advantage of ...