Home > DeveloperSection > Interviews > What are Sparse Columns in SQL?

Posted on    August-21-2014 12:05 AM

 MSSQL Server MSSQL Server 
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Sumit Kesarwani

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Posted on    August-21-2014 12:00 AM

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.

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