How to create a clustered ColumnStore index in SQL Server?
Starting with SQL Server 2016 (13.x), you can create the table as a clustered columnstore index. It is no longer necessary to first create a rowstore table and then convert it to a clustered columnstore index.
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How to convert rowstore to clustered columnstore?
If the table is a heap or clustered index, the table is converted from a rowstore to a columnstore. If the table is already a columnstore, this statement rebuilds the clustered columnstore index. To convert to an ordered clustered columnstore index, the existing index must be a clustered columnstore index.
Can a ColumnStore index contain a computed column?
Starting with SQL Server 2017, a clustered columnstore index can contain a non-persistent computed column. However, in SQL Server 2017, clustered columnstore indexes cannot contain persistent computed columns, and you cannot create nonclustered indexes on computed columns.
How to create a nonclustered index in SQL Server?
Create a nonclustered SQL Server columnstore index. Let’s first drop the clustered columnstore index we created earlier using the following command. In SSMS, expand the Kids1 table and right-click Indexes, select New Index, and click Nonclustered Columnstore Index as shown below.
How to create a memory table with a ColumnStore index?
Create an in-memory table with a columnstore index. CREATE TABLE (Transact-SQL) Starting with SQL Server 2016 (13.x), you can create a memory-optimized table with a columnstore index. The columnstore index can also be added after the table is created using the ALTER TABLE ADD INDEX syntax.
Can a clustered column index be added to a memory-optimized table?
Unlike disk-based tables, adding a clustered columnstore index to a memory-optimized table will not allow you to use the ALTER TABLE statement to change the table’s schema. Suppose we create the following memory-optimized table: