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Merge pull request #34468 from MikeRayMSFT/250618-vector-types
Update vector-data-type client library version.
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docs/t-sql/data-types/vector-data-type.md

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---
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title: "Vector Data Type (Preview)"
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title: "Vector Data Type"
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description: The vector data type stores vector data optimized for machine learning applications and similarity search operations.
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author: WilliamDAssafMSFT
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ms.author: wiassaf
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- build-2025
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---
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# Vector data type (preview)
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# Vector data type
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[!INCLUDE [sqlserver2025-asdb-asmi-fabricsqldb](../../includes/applies-to-version/sqlserver2025-asdb-asmi-fabricsqldb.md)]
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To provide a familiar experience for developers, the **vector** data type is created and displayed as a JSON array. For example, a vector with three dimensions can be represented as `'[0.1, 2, 30]'`. Implicit and explicit conversion from and to the **vector** type can be done using **varchar**, **nvarchar** and **json** types.
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> [!NOTE]
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> - This data type is in preview and is subject to change. Make sure to read preview usage terms in [Service Level Agreements (SLA) for Online Services](https://www.microsoft.com/licensing/docs/view/Service-Level-Agreements-SLA-for-Online-Services). For limitations of the current preview, see [Limitations](#limitations) and [Known issues](#known-issues).
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> - Vector features are available in Azure SQL Managed Instance configured with the [Always-up-to-date](/azure/azure-sql/managed-instance/update-policy#always-up-to-date-update-policy) policy.
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>
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> For limitations, review [Limitations](#limitations) and [Known issues](#known-issues).
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>
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> Vector features are available in Azure SQL Managed Instance configured with the [Always-up-to-date](/azure/azure-sql/managed-instance/update-policy#always-up-to-date-update-policy) policy.
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For more information on working with vector data, see:
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Applications using **TDS version 7.4 or higher** and updated drivers can natively read, write, stream, and bulk copy vector data.
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These capabilities require preview versions of the drivers. The following driver versions enable native vector support:
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These capabilities require versions of the drivers listed below. Ensure you're using the correct version to enable native vector support.
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- **Microsoft.Data.SqlClient**: Version **6.1 Preview 2** introduces the `SqlVector` type, extending `System.Data.SqlDbTypes`.
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- **Microsoft.Data.SqlClient**: Version **6.1.0** introduces the `SqlVector` type, extending `System.Data.SqlDbTypes`.
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- **Microsoft JDBC Driver for SQL Server**: Version **13.1.0 Preview** introduces the `microsoft.sql.Types.VECTOR` type and `microsoft.sql.Vector` class.
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> [!NOTE]
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### [.NET](#tab/csharp)
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> [!IMPORTANT]
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> Requires **Microsoft.Data.SqlClient 6.1 Preview 2** or later for native vector support.
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> Requires **Microsoft.Data.SqlClient 6.1.0** or later for native vector support.
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```csharp
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static void InsertNonNullVal(SqlConnection conn)
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## Known issues
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In the ongoing preview there are the following known issues:
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- Data Masking currently shows **vector** data as **varbinary** data type in the Azure portal.
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## Related content

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