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multi-column index question

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fvlo

fvlo

Programmer
Jul 29, 2003
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Hi there,
I have a question about indexes.
I have an index on say 4 columns: A, B, C, D
Do I need to create a new index on columns A, B, D if I would frequently need to update the table using columns A, B and D or does SQL-Server use the first index?
 
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usually schedule job to execute DBCC DBREINDEX on weekly base,if the columns are high-frequently updated,nightly DBCC DBREINDEX is advisable

 
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