DuckDB.NET
ADO.NET provider and native bindings for DuckDB, enabling C# applications to interact with the in-process analytical database.
What is DuckDB.NET?
DuckDB.NET is the official .NET data provider and native binding library for DuckDB, an in-process analytical database. It enables C# and .NET applications to execute SQL queries, manage database connections, and interact with DuckDB databases using standard ADO.NET interfaces. The library solves the problem of integrating DuckDB's high-performance analytical engine into .NET-based data processing pipelines and applications.
.NET developers and data engineers who need to incorporate analytical database capabilities into their C# applications, particularly those working with data-intensive workloads, embedded analytics, or local data processing.
Developers choose DuckDB.NET because it provides the official, fully-featured .NET integration for DuckDB with both high-level ADO.NET compatibility and low-level native bindings. It offers reliable performance, active maintenance, and seamless integration with the broader DuckDB ecosystem including MotherDuck.
Overview
Bindings and ADO.NET Provider for DuckDB
Use Cases
Best For
- Building .NET applications that require embedded analytical database capabilities
- Adding local SQL querying to C# desktop or server applications
- Migrating existing ADO.NET code to use DuckDB as the backend database
- Developing data processing pipelines in .NET that need in-memory analytics
- Creating C# extensions for the DuckDB database engine
- Connecting .NET applications to MotherDuck's cloud DuckDB service
Not Ideal For
- Applications requiring high-concurrency, multi-user database access with traditional client-server architecture
- Projects needing full-featured ORM support out-of-the-box without additional libraries or custom mapping
- Environments where debugging native memory issues is a critical concern during development
Pros & Cons
Pros
Implements standard System.Data interfaces like DbConnection and DbCommand, allowing .NET developers to reuse existing database code patterns with minimal changes, as shown in the usage example.
Provides low-level C# bindings to DuckDB's C API for advanced use cases, enabling performance tuning and extension development, as highlighted in the key features.
Includes built-in support for MotherDuck with simple connection string syntax, facilitating seamless migration to cloud-hosted analytical databases without extra configuration.
Offers multiple NuGet package variants including 'Data' and 'Bindings' in standard and 'Full' statically linked distributions, catering to different deployment and dependency management needs.
Cons
Known to cause System.AccessViolationException during debugging due to interaction with native memory, requiring workarounds like adjusting IDE settings, as noted in the README's known issues.
Relies on DuckDB's native libraries, which can complicate cross-platform deployment, increase binary size, and introduce potential compatibility headaches.
Focuses on ADO.NET without built-in higher-level abstractions like an ORM, necessitating more boilerplate code for object-relational mapping and data handling.
Frequently Asked Questions
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