Merge branch 'master' of https://github.com/MicrosoftDocs/sql-docs-pr into release-build-sql-ledger

Author: v-alje

docs/machine-learning/install/sql-machine-learning-azure-virtual-machine.md

@@ -13,7 +13,7 @@ monikerRange: ">=sql-server-2017||>=sql-server-linux-ver15"
 # Install SQL Server Machine Learning Services with Python and R on an Azure virtual machine
 [!INCLUDE [SQL Server 2017 and later](../../includes/applies-to-version/sqlserver2017.md)]
 
-Learn how to install Python and R with SQL Server Machine Learning Services on a virtual machine in Azure. This eliminates the installation and configuration tasks for Machine Learning Services.
+Learn how to install Python and R with [SQL Server Machine Learning Services](../sql-server-machine-learning-services.md) on a virtual machine in Azure. This eliminates the installation and configuration tasks for Machine Learning Services.
 
 Follow these steps:
 
@@ -60,4 +60,4 @@ To do this, you must allow the SQL worker accounts that are used by Launchpad to
 
 + Enable TCP/IP
 
-  TCP/IP is required for loopback connections. If you get the error "DBNETLIB; SQL Server does not exist or access denied", enable TCP/IP on the virtual machine that supports the instance.
+  TCP/IP is required for loopback connections. If you get the error "DBNETLIB; SQL Server does not exist or access denied", enable TCP/IP on the virtual machine that supports the instance.

docs/relational-databases/collations/collation-and-unicode-support.md

@@ -576,6 +576,8 @@ These collations are supported in [!INCLUDE[ssde_md](../../includes/ssde_md.md)]
 
 UTF-8 is available only to Windows collations that support supplementary characters, as introduced in [!INCLUDE[ssSQL11](../../includes/sssql11-md.md)]. The **nchar** and **nvarchar** data types allow UCS-2 or UTF-16 encoding only, and they remain unchanged.
 
+Azure SQL Database and Azure SQL Managed Instance also support UTF-8.
+
 ### <a name="storage_differences"></a> Storage differences between UTF-8 and UTF-16
 The Unicode Consortium allocates to each character a unique code point, which is a value in the range 000000–10FFFF. With [!INCLUDE[sql-server-2019](../../includes/sssql19-md.md)], both UTF-8 and UTF-16 encodings are available to represent the full range:    
 -  With UTF-8 encoding, characters in the ASCII range (000000–00007F) require 1 byte, code points 000080–0007FF require 2 bytes, code points 000800–00FFFF require 3 bytes, and code points 0010000–0010FFFF require 4 bytes. 
@@ -650,4 +652,4 @@ For more information, see the following related content:
 [Contained Database Collations](../../relational-databases/databases/contained-database-collations.md)     
 [Choose a Language When Creating a Full-Text Index](../../relational-databases/search/choose-a-language-when-creating-a-full-text-index.md)     
 [sys.fn_helpcollations (Transact-SQL)](../../relational-databases/system-functions/sys-fn-helpcollations-transact-sql.md)       
-[Single-Byte and Multibyte Character Sets](/cpp/c-runtime-library/single-byte-and-multibyte-character-sets)
+[Single-Byte and Multibyte Character Sets](/cpp/c-runtime-library/single-byte-and-multibyte-character-sets)

docs/t-sql/spatial-geography/collectionaggregate-geography-data-type.md

@@ -2,7 +2,7 @@
 description: "CollectionAggregate (geography Data Type)"
 title: "CollectionAggregate (geography Data Type) | Microsoft Docs"
 ms.custom: ""
-ms.date: "07/30/2017"
+ms.date: "05/18/2021"
 ms.prod: sql
 ms.prod_service: "database-engine, sql-database"
 ms.reviewer: ""
@@ -25,7 +25,7 @@ Creates a **GeometryCollection** instance from a set of **geography** objects.
 
 ```  
   
-ConvexHullAggregate ( geography_operand )  
+CollectionAggregate ( geography_operand )  
 ```  
 
 [!INCLUDE[sql-server-tsql-previous-offline-documentation](../../includes/sql-server-tsql-previous-offline-documentation.md)]