(1)661是sql2008 R2的版本号
Microsoft SQL Server 2008 R2 (RTM) - 10.50.1600.1 (Intel X86) Apr 2 2010 15:53:02 Copyright (c) Microsoft
(2)655版本也就是sql2008 sp1版本号
Microsoft SQL Server 2008 (SP1) - 10.0.2531.0 (Intel X86) Mar 29 2009 10:27:29 Copyright (c) 1988-2008
(3)
80 = SQL Server 2000
90 = SQL Server 2005
100 = SQL Server 2008