Error:
------------------------------
Database diagram support objects cannot be installed because this
database does not have a valid owner. To continue, first use the Files
page of the Database Properties dialog box or the ALTER AUTHORIZATION
statement to set the database owner to a valid login, then add the
database diagram support objects.
database does not have a valid owner. To continue, first use the Files
page of the Database Properties dialog box or the ALTER AUTHORIZATION
statement to set the database owner to a valid login, then add the
database diagram support objects.
解决方法：
1. 右键点击数据库，选“properties ”
2. 点选左侧“Options”
3. 在'Compatibility Level' 选 'SQL Server 2005(90)'
4. 点选左侧“Files”
5. 在owner里填入 'sa'
6. OK
2. 点选左侧“Options”
3. 在'Compatibility Level' 选 'SQL Server 2005(90)'
4. 点选左侧“Files”
5. 在owner里填入 'sa'
6. OK
-----
说明，主要是owner的问题，不要管它的提示，可能把owner改一下，再改回去，问题就解决了。
本文转自Jack Niu博客园博客，原文链接：http://www.cnblogs.com/skywind/archive/2006/08/08/470701.html，如需转载请自行联系原作者
