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8.8

MS SQl Indexes

Asked by CraigLazar in Databases Miscellaneous, SQL Server 2008, SQL Server 2005

HI,
I have a database in MS SQL and been reading up on indexes and have some questions,
I have a main table say tblMain with a Unique ID. i have about 10 tables where  i have set up Primary - Foreign key constraints between tblMain to my 10 tables.
I then have many select statements based on these relationships in the way of joins.
1. Would it improve performance to Index the Foreign keys in the 10 tables?
2. When creating an index on one of the tables, i see SQL allows u to create an index and select multiple fields as part of the index, if i wanted to index 2 fields on a table, would it be better to create 2 separate indexes or create them under 1?
3.From what i have read, index's are cached in memory, does it also grow the database file?

thanks allot
[+][-]09/30/09 10:12 AM, ID: 25461001Accepted Solution

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Zones: Databases Miscellaneous, SQL Server 2008, SQL Server 2005
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Solution Provided By: JestersGrind
Participating Experts: 2
Solution Grade: A
 
[+][-]09/30/09 10:22 AM, ID: 25461101Assisted Solution

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[+][-]10/01/09 08:58 AM, ID: 25470090Author Comment

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