adding reference to statistics for memory-optimized tables

Author: jodebrui

docs/database-engine/install-windows/complete-the-database-engine-upgrade.md

@@ -1,7 +1,7 @@
 ---
 title: "Complete the Database Engine Upgrade | Microsoft Docs"
 ms.custom: ""
-ms.date: "07/21/2017"
+ms.date: "10/23/2017"
 ms.prod: 
    - "sql-server-2016"
    - "sql-server-2017"
@@ -25,7 +25,7 @@ After upgrading the [!INCLUDE[ssDE](../../includes/ssde-md.md)], complete the fo
 
 - **Backup your databases:** Perform a full backup of each database.  
 
-- **Enable new features:** In SQL Server 2016 and SQL Server 2017, some changes are only enabled once the DATABASE_COMPATIBILITY level for a database has been changed to 130 or greater.  For more information and for the recommended workflow, see [Change the Database Compatibility Mode and Use the Query Store](../../database-engine/install-windows/change-the-database-compatibility-mode-and-use-the-query-store.md).  
+- **Enable new features:** In SQL Server 2016 and SQL Server 2017, some changes are only enabled once the DATABASE_COMPATIBILITY level for a database has been changed to 130 or greater.  For more information and for the recommended workflow, see [Change the Database Compatibility Mode and Use the Query Store](../../database-engine/install-windows/change-the-database-compatibility-mode-and-use-the-query-store.md). If your database has memory-optimized tables created in SQL Server 2014, review [Statistics for Memory-Optimized Tables](../../relational-databases/in-memory-oltp/statistics-for-memory-optimized-tables.md).
 
 - **Integration Services:**