If you attempt to start it while the server is in single - user mode , an error will be returned and database engine tuning advisor will not start 如果试图在服务器处于单用户模式时启动该服务器，将返回错误，并且不会启动数据库引擎优化顾问。
Some startup options such as single - user mode and minimal configuration mode are principally used during troubleshooting . starting the server for troubleshooting with the 某些启动选项（如单用户模式选项和最低配置模式选项）主要在故障排除过程中使用。
If other users are connected to the database at the time that you set the database to single - user mode , their connections to the database will be closed without warning 如果其他用户在您将数据库设置为单用户模式时连接到了数据库，则他们与数据库的连接将被关闭，且不发出警告。
When using the detach - and - attach method of the copy database wizard to upgrade a database , make sure that no applications or services are trying to access the database 使用复制数据库向导的分离和附加方法升级数据库时，请将数据库置于单用户模式，并确保没有任何应用程序或服务尝试访问数据库。
If this fails , put the database in single - user mode by using the alter database statement and trying drop xml schema collection again . if the xml schema collection exists in 如果使用该命令失败，则请使用alter database语句将数据库置于单用户模式，然后再次尝试drop xml schema collection命令。
When you call the xml schema namespace , you can try to retrieve a single xml schema namespace , you can try the call when the system load is lighter , or you can try the call in single - user mode 当调用xml _ schema _ namespace时，您可以尝试检索单个xml架构命名空间，或者您也可以在系统负荷更少时尝试调用，或者您还可以在单用户模式下尝试调用。
For example , to run a sql server instance in single - user mode , it may be necessary to run a clustered instance of sql server as a stand - alone instance from a command prompt instead of starting sql server through mscs 例如，若要以单用户模式运行sql server实例，则有必要从命令提示符将sql server群集实例作为独立实例运行，而不是通过mscs启动sql server 。
Init level 0 is when the system is totally brought down and ready for power to be turned off . init level 1 is single - user mode without any network activity . init levels 2 and 3 are commonly used to run multi - user mode with network activity , and the state in which most machines run 级别0表示系统完全卸载可以关断电源；级别1则表示没有网络支持的单用户模式；级别2和3一般用作网络支持的多用户模式，也就是多数机器的运行模式。
