它''很容易解释，但修复它可能会遇到更多问题...

版本655文件由SQL Server 2008创建，但服务器最多只支持版本612，即SQL 2005。



您无法在早期版本的SQL Server中打开SQL 2008（或SQL 2008 R2）文件。您必须使用要部署的相同或早期版本的SQL来开发软件。



在实践中，他们可能做的***的事情就是单独安装SQL 2005 Express版本，用于使用软件在2008和2005版本之间进行开发和复制数据。我强烈建议您不要在开发PC上安装它 - 我已经安装了完全由SQL服务器安装的Visual Studio安装，特别是降级。使用不同的备用机器或首先备份整个PC！

It''s quite simple to explain, but you may have more problems fixing it...
Version 655 files are created by SQL server 2008, but the server supports only up to version 612, which is SQL 2005.

You cannot open SQL 2008 (or SQL 2008 R2) files in earlier versions of SQL server. You must develop your software using the same or earlier version of SQL that you intend to deploy to.

In practice, they best thing you can probably do is install a separate SQL 2005 Express edition for development and copy the data between the 2008 and 2005 versions using software. I would STRONGLY recommend that this is not installed on your development PC - I have have had Visual Studio installations completely bolloxed by SQL server installations, particularly downgrades. Use a different, spare machine or backup the whole PC first!