• I thought I remembered a Version 1.0 of SQL Server and sure enough, there was. According to Wikipedia, Version 1.0 was released in 1989 as an OS/2 version on 16-bit. Version 1.1 was released in 1991, again on OS/2. Then in 1993 was the first Windows NT edition which was SQL Server 4.21. http://en.wikipedia.org/wiki/Microsoft_SQL_Server