Clustered Columnstore Index. Why are filtered nonclustered columnstore indexes smarter. To reduce fragmentation of the column segments and improve performance the columnstore index might store some data temporarily into a clustered index called a deltastore and a btree list of IDs for deleted rows.
Theyre best suited for wide data warehouse fact tables that have lots of columns but your queries might only want a few of those columns and they might pick any of the columns for filtering. 102400 rows in a table with a Clustered Columnstore index ends up in the delta store. Mar 25 2014 SQL Server 2014 brings clustered columnstore indexes and theyre totally writeable you can insert update or delete into them.
A clustered columnstore index is the physical storage for the entire table.
Clustered columnstore index CCI for DataMart analytics workloads and nonclustered columnstore index NCCI to run analytics queries on operational ie. Table partitioning is a natural fit for a large columnstore index. Jul 13 2015 So SQL 2016 comes with updatable non clustered columnstore index. Dec 20 2018 Compressed Columnstore If you insert a small number of rows.
