Before installing, ensure your system meets these minimum criteria: Microsoft SQL Server Compact 4.0 SP1

Note: On a 64-bit computer, it is often recommended to install both the 32-bit and 64-bit versions to ensure compatibility with various application processes.

Microsoft SQL Server Compact 4.0 SP1 (SQL CE) is a free, lightweight, embedded database engine designed for building and Windows desktop applications . As a "zero-administration" database, it allows developers to integrate a relational database into their software without requiring a complex server installation on the end-user's machine. How to Download Microsoft SQL Server Compact 4.0 SP1

The official runtime installers are available through the Microsoft Download Center . Depending on your operating system architecture, you will need to select the appropriate file: Installer File Target System Architecture 32-bit (x86) Windows Systems SSCERuntime_x64-ENU.exe 64-bit (x64) Windows Systems

Supports SHA2 encryption algorithms for securing database files (.sdf).

The runtime occupies only a few megabytes, making it ideal for local storage and easy redistribution.