SQL Server 2014 New Feature : Updateable columnstore indexes

Columnstore indexes in SQL Server 2014 brought a dramatic boost to data warehouse performance, but with a hitch: They couldn't be updated. With SQL Server 2014, now they can. This means you no longer have to drop and re-create columnstore indexes every time you need to load your warehouse tables. Not only that, but updateability also means you may be able to look at columnstore indexes for certain OLTP applications. The caveat is that you must have a clustered columnstore index on the table. Non-clustered columnstores aren't supported.

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