SQL Server 數據庫還原失敗，數據庫在使用中(database is in use) 的解決方案
設置數據庫離線
use master
alter database DB_NAME set offline with rollback immediate;
恢復數據庫
設置數據庫在線
use master
alter database DB_NAME set online with rollback immediate;
alter database DB_NAME set offline with rollback immediate;
恢復數據庫
設置數據庫在線
use master
alter database DB_NAME set online with rollback immediate;