How Can You Find Out If An Index Is Being Used Or Not In SQL Server?

Is there a way to detect and or gather information that show what indexes are being used and how often the are being used in a SQL Server database?
Omega002Asked:
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Forefront_Data_SolutionsCommented:
If you are using SQL Server 2005 or later, there are some useful queries you can use.  Check these out:
http://www.mssqltips.com/tip.asp?tip=1239
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Aneesh RetnakaranDatabase AdministratorCommented:
if you haven't restarted your system for a while the following script will list out the indexes, you have to monitor them for few days bbefore you delete

 SELECT   * FROM      sys.indexes idx          JOIN      sys.dm_db_index_usage_stats ius ON idx.object_id = ius.object_id                                                       AND idx.index_id = ius.index_id          WHERE     idx.type_desc = 'nonclustered'                    AND ius.user_seeks = ( SELECT   MAX(user_seeks)                                           FROM     sys.dm_db_index_usage_stats                                           WHERE    object_id = ius.object_id                                                    AND type_desc = 'nonclustered' )      
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SharathData EngineerCommented:
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Omega002Author Commented:
can I also see this over a period of time like for the last 3 months?
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Omega002Author Commented:
Is there a way to capture Index usage in SQL Server Over a daily, weekly, monthly and quarterly period?
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SharathData EngineerCommented:
No, you cannot. On a regular basis, if you can save the result of the query mentioned in the URL  to a temp table, you can have the history.
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Microsoft SQL Server

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