[轉]Troubleshooting Error 18456

原文鏈接：http://sqlblog.com/blogs/aaron_bertrand/archive/2011/01/14/sql-server-v-next-denali-additional-states-for-error-18456.aspx

1      'Account is locked out'
2      'User id is not valid'
3-4    'Undocumented'
5      'User id is not valid'
6      'Undocumented'
7      'The login being used is disabled'
8      'Incorrect password'
9      'Invalid password'
10     'Related to a SQL login being bound to Windows domain password policy enforcement.
        See KB925744.'
11-12  'Login valid but server access failed'
16     'Login valid, but not permissioned to use the target database'
18     'Password expired'
27     'Initial database could not be found'
38     'Login valid but database unavailable (or login not permissioned)'