Update connector-azure-sql-database.md

Author: jianleishen

articles/data-factory/connector-azure-sql-database.md

@@ -8,7 +8,7 @@ ms.service: data-factory
 ms.subservice: data-movement
 ms.topic: conceptual
 ms.custom: synapse
-ms.date: 12/24/2021
+ms.date: 01/14/2022
 ---
 
 # Copy and transform data in Azure SQL Database by using Azure Data Factory or Azure Synapse Analytics
@@ -483,6 +483,12 @@ To copy data to Azure SQL Database, the following properties are supported in th
 | writeBatchTimeout | The wait time for the batch insert operation to finish before it times out.<br/> The allowed value is **timespan**. An example is "00:30:00" (30 minutes). | No |
 | disableMetricsCollection | The service collects metrics such as Azure SQL Database DTUs for copy performance optimization and recommendations, which introduces additional master DB access. If you are concerned with this behavior, specify `true` to turn it off. | No (default is `false`) |
 | maxConcurrentConnections |The upper limit of concurrent connections established to the data store during the activity run. Specify a value only when you want to limit concurrent connections.| No |
+| WriteBehavior | Specify the write behavior for copy activity to load data into Azure SQL Database. <br/> The allowed value is **Insert** and **Upsert**. By default, the service uses insert to load data. | No |
+| upsertSettings | Specify the group of the settings for write behavior. <br/> Apply when the WriteBehavior option is `Upert`. | No |
+| ***Under `upsertSettings`:*** | | |
+| useTempDB | Specify whether to use the a global temporary table or physical table as the interim table for upsert. <br>By default, the service uses global temporary table as the interim table. value is `true`. | No |
+| interimSchemaName | Specify the interim schema for creating interim table if physical table is used. Note: user need to have the permission for creating and deleting table. By default, interim table will share the same schema as sink table. <br/> Apply when the useTempDB option is `False`. | No |
+| keys | Specify the column names for unique row identification. Either a single key or a series of keys can be used. If not specified, the primary key is used. | No |
 
 **Example 1: Append data**
 
@@ -556,6 +562,45 @@ Learn more details from [Invoke a stored procedure from a SQL sink](#invoke-a-st
     }
 ]
 ```
+**Example 1: Upsert data**
+
+```json
+"activities":[
+    {
+        "name": "CopyToAzureSQLDatabase",
+        "type": "Copy",
+        "inputs": [
+            {
+                "referenceName": "<input dataset name>",
+                "type": "DatasetReference"
+            }
+        ],
+        "outputs": [
+            {
+                "referenceName": "<Azure SQL Database output dataset name>",
+                "type": "DatasetReference"
+            }
+        ],
+        "typeProperties": {
+            "source": {
+                "type": "<source type>"
+            },
+            "sink": {
+                "type": "AzureSqlSink",
+                "tableOption": "autoCreate",
+                "writeBatchSize": 100000,
+                "writeBehavior": "upsert",
+                "upsertSettings": {
+                    "useTempDB": true,
+                    "keys": [
+                        "<column name>"
+                    ]
+                },
+            }
+        }
+    }
+]
+```
 
 ## Parallel copy from SQL database