当您将数据库备份恢复到另一台服务器时，可能会遇到孤立用户的问题。
When you restore a database backup to another server, you may experience a problem with orphaned users.
循环日志记录通常在数据仓库环境中使用，在该环境中，恢复数据库需要的只是恢复数据库映象的问题。
Circular logging is typically used in data warehouse environments where the need to recover a database is just a matter of restoring a database image.
同样的，如果您的数据库有太多问题，恢复整个数据库也许是合理的。
Similarly, if there are too many problems with your database, it might make sense to restore the entire database.
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