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Copy file name to clipboardExpand all lines: articles/synapse-analytics/synapse-link/faq.yml
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ms.service: azure-synapse-analytics
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ms.topic: faq
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ms.subservice: synapse-link
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ms.date: 10/21/2024
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ms.date: 05/07/2025
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ms.custom: references_regions
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title: Azure Synapse Link for SQL FAQ
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summary: In this guide, find the most frequently asked questions for Azure Synapse Link for SQL.
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Does Azure Synapse Link for SQL support Azure SQL Managed Instance as a source store?
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answer: |
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No, currently Azure Synapse Link for SQL only supports Azure SQL Database and SQL Server (starting with SQL Server 2022) as the source.
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No, currently Azure Synapse Link for SQL only supports Azure SQL Database and SQL Server 2022 as the source.
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Do I need to stop the link connection when I want to add or remove tables to be replicated?
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A new change feed processor has been integrated into the Azure SQL Database and SQL Server 2022 engine to enable this functionality.
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How do I rotate or change the SAS for the Landing Zone for Azure Synapse Link for SQL Server?
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How do I rotate or change the SAS for the Landing Zone for Azure Synapse Link for SQL Server 2022?
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If the SAS has expired for the user managed storage account for the Landing Zone, use [ALTER DATABASE SCOPED CREDENTIAL](/sql/t-sql/statements/alter-database-scoped-credential-transact-sql) to update the database credential for the new SAS.
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What is the impact when a user removes the Azure Synapse workspace that contains an Azure Synapse Link to Azure SQL Database?
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If the Azure Synapse workspace is removed, Azure SQL Database will stop data replication from landing zone into Azure Synapse. The system stored procedure [sp_change_feed_drop_table_group](/sql/relational-databases/system-stored-procedures/sp-change-feed-drop-table-group) will be called automatically, and the storage account for the landing zone is managed and will be cleaned up automatically. If this fails, you might receive error 22739 from the SynapseGatewayClient in [sys.dm_change_feed_errors](/sql/relational-databases/system-dynamic-management-views/sys-dm-change-feed-errors). If this occurs, you can manually drop the `changefeed` table group with `sp_change_feed_drop_table_group`.
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What is the impact when a user removes the Azure Synapse workspace that contains an Azure Synapse Link for SQL Server?
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What is the impact when a user removes the Azure Synapse workspace that contains an Azure Synapse Link for SQL Server 2022?
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In SQL Server, since landing zone storage account is user managed, data will continue to be published to the landing zone. You should disable the Azure Synapse Link by dropping the relevant table groups with [sp_change_feed_drop_table_group](/sql/relational-databases/system-stored-procedures/sp-change-feed-drop-table-group), and manually remove the storage account for the landing zone.
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In SQL Server 2022, since landing zone storage account is user managed, data will continue to be published to the landing zone. You should disable the Azure Synapse Link by dropping the relevant table groups with [sp_change_feed_drop_table_group](/sql/relational-databases/system-stored-procedures/sp-change-feed-drop-table-group), and manually remove the storage account for the landing zone.
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What is the impact when a user intentionally removes the Azure Synapse Link landing zone for Azure Synapse Link for SQL Server?
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What is the impact when a user intentionally removes the Azure Synapse Link landing zone for Azure Synapse Link for SQL Server 2022?
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In SQL Server, the landing zone storage account is user managed. If the landing zone storage account is no longer accessible, you will see errors in the [sys.dm_change_feed_errors](/sql/relational-databases/system-dynamic-management-views/sys-dm-change-feed-errors). You should disable the Azure Synapse Link by dropping the relevant table groups with [sp_change_feed_drop_table_group](/sql/relational-databases/system-stored-procedures/sp-change-feed-drop-table-group).
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In SQL Server 2022, the landing zone storage account is user managed. If the landing zone storage account is no longer accessible, you will see errors in the [sys.dm_change_feed_errors](/sql/relational-databases/system-dynamic-management-views/sys-dm-change-feed-errors). You should disable the Azure Synapse Link by dropping the relevant table groups with [sp_change_feed_drop_table_group](/sql/relational-databases/system-stored-procedures/sp-change-feed-drop-table-group).
Copy file name to clipboardExpand all lines: articles/synapse-analytics/synapse-link/sql-database-synapse-link.md
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ms.service: azure-synapse-analytics
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ms.topic: conceptual
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ms.subservice: synapse-link
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ms.date: 11/16/2022
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ms.date: 05/07/2025
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ms.author: rosouz
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You need to select compute core counts for each link connection to replicate your data. The core counts represent the compute power and it impacts your data replication latency and cost.
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You also have the chance to make a trade-off between cost and latency by selecting the continuous or batch mode to replicate the data. When you select continuous mode, the runtime will be running continuously so that any changes applied to your SQL DB or SQL Server will be replicated to Synapse with low latency. When you select batch mode with specified interval, the changes applied to your SQL DB or SQL Server will be accumulated and replicated to Synapse in a batch mode with specified interval. By doing so, you can save cost as you are only charged for the time when the runtime is required to replicate your data. After each batch of data is replicated, the runtime will be shut down automatically.
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You also have the chance to make a trade-off between cost and latency by selecting the continuous or batch mode to replicate the data.
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- When you select continuous mode, the runtime will be running continuously so that any changes applied to your Azure SQL Database or SQL Server 2022 instance will be replicated to Synapse with low latency.
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- When you select batch mode with specified interval, the changes applied to your Azure SQL Database or SQL Server 2022 instance will be accumulated and replicated to Synapse in a batch mode with specified interval. By doing so, you can save cost as you are only charged for the time when the runtime is required to replicate your data. After each batch of data is replicated, the runtime will be shut down automatically.
Copy file name to clipboardExpand all lines: articles/synapse-analytics/synapse-link/sql-synapse-link-overview.md
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ms.service: azure-synapse-analytics
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ms.topic: overview
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ms.subservice: synapse-link
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ms.date: 11/18/2024
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ms.date: 05/07/2025
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ms.author: rosouz
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# What is Azure Synapse Link for SQL?
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Azure Synapse Link for SQL enables near real time analytics over operational data in Azure SQL Database or SQL Server 2022. With a seamless integration between operational stores including Azure SQL Database and SQL Server 2022 and Azure Synapse Analytics, Azure Synapse Link for SQL enables you to run analytics, business intelligence and machine learning scenarios on your operational data with minimum impact on source databases with a new change feed technology.
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The following image shows the Azure Synapse Link integration with Azure SQL DB, SQL Server 2022, and Azure Synapse Analytics:
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The following image shows the Azure Synapse Link integration with Azure SQL Database, SQL Server 2022, and Azure Synapse Analytics:
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:::image type="content" source="../media/sql-synapse-link-overview/synapse-link-sql-architecture.png" alt-text="Diagram of the Azure Synapse Link for SQL architecture.":::
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