Filtered index

Filtered index

Filtered index is a feature added in SQL Server 2008 and serves a great purpose for some of the requirements
As a general we all know that index improves search performance if INDEX is created properly
But some cases where we font requires data from entire column but only some filtered values
Even for this we have to create index for data entire column.
Whenever we query this column it has to read index for all values  column.

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