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What are Sparse Columns?

Posted By :Dhivakaran     Posted Date :October 25, 2010    Points :10   Category :Sql Server 
A sparse column is another tool used to reduce the amount of physical storage used in a database. They are the ordinary columns that have an optimized storage for null values. Sparse columns reduce the space requirements for null values at the cost of more overhead to retrieve nonnull values.

You can also find related Interview Question to What are Sparse Columns?  below: 

How many Columns per INSERT statement is allowed

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