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Update columnstore-indexes-design-guidance.md
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docs/relational-databases/indexes/columnstore-indexes-design-guidance.md

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|Create a table as a columnstore.|[CREATE TABLE (Transact-SQL)](../../t-sql/statements/create-table-transact-sql.md)|Beginning with [!INCLUDE[ssSQL15](../../includes/sssql15-md.md)], you can create the table as a clustered columnstore index. You do not have to first create a rowstore table and then convert it to columnstore.|
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|Create a memory table with a columnstore index.|[CREATE TABLE (Transact-SQL)](../../t-sql/statements/create-table-transact-sql.md)|Beginning with [!INCLUDE[ssSQL15](../../includes/sssql15-md.md)], 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.|
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|Convert a rowstore table to a columnstore.|[CREATE COLUMNSTORE INDEX (Transact-SQL)](../../t-sql/statements/create-columnstore-index-transact-sql.md)|Convert an existing heap or binary tree to a columnstore. Examples show how to handle existing indexes and also the name of the index when performing this conversion.|
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|Convert a columnstore table to a rowstore.|[CREATE CLUSTERED INDEX (Transact-SQL) or DROP INDEX](../../t-sql/statements/create-columnstore-index-transact-sql.md)|Usually this is not necessary, but there can be times when you need to perform this conversion. Examples show how to convert a columnstore to a heap or clustered index.|
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|Convert a columnstore table to a rowstore.|[CREATE CLUSTERED INDEX (Transact-SQL)](../../t-sql/statements/create-columnstore-index-transact-sql.md#d-convert-a-columnstore-table-to-a-rowstore-table-with-a-clustered-index) or [Convert a columnstore table back to a rowstore heap](../../t-sql/statements/create-columnstore-index-transact-sql.md#e-convert-a-columnstore-table-back-to-a-rowstore-heap) |Usually this conversion isn't necessary, but there can be times when you need to convert. Examples show how to convert a columnstore to a heap or clustered index.|
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|Create a columnstore index on a rowstore table.|[CREATE COLUMNSTORE INDEX (Transact-SQL)](../../t-sql/statements/create-columnstore-index-transact-sql.md)|A rowstore table can have one columnstore index. Beginning with [!INCLUDE[ssSQL15](../../includes/sssql15-md.md)], the columnstore index can have a filtered condition. Examples show the basic syntax.|
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|Create performant indexes for operational analytics.|[Get started with Columnstore for real time operational analytics](../../relational-databases/indexes/get-started-with-columnstore-for-real-time-operational-analytics.md)|Describes how to create complementary columnstore and B-tree indexes so that OLTP queries use B-tree indexes and analytics queries use columnstore indexes.|
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|Create performant columnstore indexes for data warehousing.|[Columnstore indexes - data Warehousing](../../relational-databases/indexes/columnstore-indexes-data-warehouse.md)|Describes how to use B-tree indexes on columnstore tables to create performant data warehousing queries.|

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