MSDE

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Microsoft SQL Server Data Engine (MSDE, also Microsoft Data Engine or Microsoft Desktop Engine) is a relational database management system developed by Microsoft. It is a scaled-down version of Microsoft SQL Server 7.0 or 2000 which is free for non-commercial use as well as certain limited commercial use. It was introduced at Microsoft TechEd in May 1999,^[1] and was included as part of Microsoft Office 2000 Developer Edition. Its successor, SQL Server Express was released in November 2005.^[2] Vendor support of MSDE ended on April 8, 2008.^[3]