Jeremy D. Miller • 6/23/2026

SQL Server as a Document Database — and why you want that!

This article presents Polecat, a new .NET library from the creators of Marten, which enables using SQL Server 2025 as a document database and event store. It explains the motivation behind Polecat—escaping the friction of ORMs like EF Core—and highlights how Polecat takes advantage of SQL Server 2025's native JSON data type. The article includes a complete code example showing how to set up a document store and persist objects without migrations or mapping files, targeting .NET developers familiar with SQL Server who want a more productive, document-oriented approach.

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#json #.net #SQL Server