Question

If I use INCLUDE clause and add some columns to a Non-Clustered Index, does this mean I am storing the data both on INDEX and on its PAGE -meaning at least DOUBLING the space consumed-?

Était-ce utile?

La solution

Yes. This space doubling also goes for index keys. Indexes can make up a significant amount of storage space.

A covering index with all table columns will be almost exactly the size of the original table, just sorted differently.

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