附加到SQL2012的数据库就不能再附加到低于SQL2012的数据库版本
附加到SQL2012的数据库就不能再附加到低于SQL2012的数据库版本 昨天我只是将数据库附加到SQL2012，然后各个数据库都做了收缩事务日志的操作 兼容级别这些都没有改 再附加回SQL2005的时候就报错 在SQL2012里附加，确实是90级别，但是在SQL2005死活附加不上 备
附加到SQL2012的数据库就不能再附加到低于SQL2012的数据库版本
昨天我只是将数据库附加到SQL2012，然后各个数据库都做了收缩事务日志的操作
兼容级别这些都没有改
再附加回SQL2005的时候就报错
在SQL2012里附加，确实是90级别，但是在SQL2005死活附加不上
备份数据库再还原也是一样
重建事务日志也是一样
然后我做了一个实验，检查一下附加到SQL2012的数据库和附加到SQL2005的数据库，两个数据库的文件头有什么不同
注意：两个数据库的兼容级别都是90，附加到SQL2012之后我也没有动过兼容级别！！
我们用同一个数据库，分别附加到SQL2005上和SQL2012上，，看一下附加之后数据库的文件头有没有改变
这个数据库的兼容级别是90的
附加到SQL2012之后，我也不改变他的兼容级别
查看文件头的SQL语句如下，实际上就是数据库的第0页：
) 2 DBCC PAGE(dlgpos,1,0,3)
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