Microsoft SQL Server
In 1987 Microsoft and Sybase started a partnership to build/sell a Database Management System, based on the then (yet to be released) Sybase DataServer product.
In 1994 the partnership was dissolved and Sybase was allowed to sell its product for the first time on OS/2 and Windows and Microsoft could take the code in any direction it wanted. Microsoft did indeed take the product in its own direction, building on the SQL Server for NT code base and releasing SQL Server 6.0 and 6.5 within 18 months. At this point in time SQL Server was a success in its own right with the code (and features) significantly different from the original Sybase code of the 4.2 for OS/2 version.
Microsoft decided to go "big" on the data management front. Microsoft went out and hired some of the best and most experienced people in the database industry and paired them with the best in research and some of the smartest new graduates from Database Masters and PhD programs from around the world, combing these folks with the original "soul" of the team. Some of this team worked on 6.0/6.5 but a number of them came on line to work on what was called Sphinx, the code name for the next version of SQL Server, which was shipped as version 7.0.
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