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9.0

Disadvantages of indexing

Asked by km1039 in MS SQL Server

Tags: disadvantages, index

What are the disadvantages of indexing (non-clustered)?  I have a table (7 fields) which stores student information (first name, last name, gender, etc).  I also have a web based .NET application that allows users to search for students based on the these 7 fields.  Therefore I want to create a non-clustered index on all the fields for faster results.   My initial guess is that indexing these fields would require more space but given that these fields are non-clustered I don't have to worry about a performance loss with page splits.  I have heard that you can over index your tables but when does this occur.  This table is large enough where index scans would be much faster than tablescan.

Also regarding clustered indexes, I know that you want create a clustered index on fields with low selectivity where you may want to search for a range of values.  Would it also be wise to add a clustered index on a foreign key in a table.  Would that speed up things when joining tables?
[+][-]03/07/04 11:55 PM, ID: 10538810Expert Comment

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[+][-]03/08/04 12:09 AM, ID: 10538865Author Comment

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[+][-]03/08/04 12:15 AM, ID: 10538882Expert Comment

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[+][-]03/08/04 12:33 AM, ID: 10538966Accepted Solution

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Zone: MS SQL Server
Tags: disadvantages, index
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Solution Provided By: Lowfatspread
Participating Experts: 4
Solution Grade: A
 
[+][-]03/08/04 12:58 AM, ID: 10539064Expert Comment

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[+][-]03/08/04 04:00 AM, ID: 10539769Expert Comment

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