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幸运快艇骰宝在SQL Server的数据库惊奇历程中，有技巧在一些特别情况下需要在单用户形态(single-user mode)下启动SQL Server实例。底下回归一下单用户形态启动SQL Server的几种神色：
欧博真人娱乐平台 1：号召形态(sqlservr.exe)启动最初在号召窗口中切换到SQL Server的Binn目次下(这个要视SQL Server实践装配旅途情况而定，另外，在SQL Server多实例情况下，必须切换到对应旅途)，如若你对sqlservr.exe号召不纯属，不错检察干系匡助信息。如下所示：
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sqlservr.ex启动时，现时环境存在多实例的情况下，而你又莫得指定参数-s的值，那么就会收到相同如下信息， 需要你指定-s参数。
C:\Program Files\Microsoft SQL Server\MSSQL12.MSSQLSERVER\MSSQL\Binn>sqlservr.exe -c -m 2018-04-06 11:40:54.15 Server Multiple instances of SQL server are installe d on this computer. Renter the command, specifying the -s parameter with the nam e of the instance that you want to start. 2018-04-06 11:40:54.16 Server SQL Server shutdown has been initiated sqlservr.exe -c -m -s{instancename}
sqlservr.ex启动时，如若SQL Server工作自己还在启动，就会报“Operating system error = 32(The process cannot access the file because it is being used by another process.).
C:\Program Files\Microsoft SQL Server\MSSQL12.MSSQLSERVER\MSSQL\Binn>sqlservr.exe -c -m -sMSSQLSERVER 2018-04-06 11:41:59.01 Server Error: 17058, Severity: 16, State: 1. 2018-04-06 11:41:59.01 Server initerrlog: Could not open error log file 'C: \Program Files\Microsoft SQL Server\MSSQL12.MSSQLSERVER\MSSQL\Log\ERRORLOG'. Ope rating system error = 32(The process cannot access the file because it is being used by another process.). 2018-04-06 11:41:59.32 Server Error: 17058, Severity: 16, State: 1. 2018-04-06 11:41:59.32 Server initerrlog: Could not open error log file 'C: \Program Files\Microsoft SQL Server\MSSQL12.MSSQLSERVER\MSSQL\Log\ERRORLOG'. Ope rating system error = 32(The process cannot access the file because it is being used by another process.). 2018-04-06 11:42:02.04 Server SQL Server shutdown has been initiated
如若在sqlservr.exe当中退出单用户形态，径直使用CTRL+C 或 CTRL + Break，如下所示：
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2：号召形态(net star)启动C:\Users>net stop mssqlserver The following services are dependent on the SQL Server (MSSQLSERVER) service. Stopping the SQL Server (MSSQLSERVER) service will also stop these services. SQL Server Agent (MSSQLSERVER) Do you want to continue this operation? (Y/N) [N]: y The SQL Server Agent (MSSQLSERVER) service is stopping. The SQL Server Agent (MSSQLSERVER) service was stopped successfully. The SQL Server (MSSQLSERVER) service is stopping. The SQL Server (MSSQLSERVER) service was stopped successfully. C:\Program Files\Microsoft SQL Server\MSSQL12.MSSQLSERVER\MSSQL\Binn>net start mssqlserver /m The SQL Server (MSSQLSERVER) service is starting. The SQL Server (MSSQLSERVER) service was started successfully.
在SQL Server建树处置器中，找到对应实例，右键单击属性，在启动参数内部增多参数-m，欧博代理开户然后重启即可。
在单用户形态下启动SQL Server实例时，请谨防下列事项：
网络安全 只消一个用户不错相接到工作器。 不延伸CHECKPOINT 进度。默许情况下，启动时自动延伸此进度。在单用户形态下启动SQL Server 可使用诡计机腹地 Administrators 组的任何成员当作 sysadmin 固定工作器变装的成员相接到 SQL Server 实例。联系详备信息，请参阅在系统处置员被锁定时相接到 SQL Server。
在单用户形态下， 只消一个用户不错相接到工作器，那么这么问题就来了，很有可能当你需要登录的技巧，这个唯独的的用户一经被其它用户疾足先得了。此时你却被拒之门外，是否终点捏狂。此时你可能碰到底下额外
C:\Users>sqlcmd Sqlcmd: Error: Microsoft ODBC Driver 11 for SQL Server : Login failed for user ' xxxx'. Reason: Server is in single user mode. Only one administrator c an connect at this time..
SSMS客户端一般碰到底下这么的额外信息：
美高梅金卡是什么Login failed for user 'xxxx'. Reason: Server is in single user mode. Only one administrator can connect at this time. (Microsoft SQL Server, Error: 18461)
额外日记或号召内部输出的日记，你会看到相同如下信息：
2018-04-06 12:21:14.85 Logon Error: 18461, Severity: 14, State: 1. 2018-04-06 12:21:14.85 Logon Login failed for user 'xxx'. Reason: Server is in single user mode. Only one administrator can connect at this time. [CLIENT: 192.168.xxx.xxx]
在这种情况下，何如办呢?难谈要拼速率?虽然不是，你需要从底下这些方面谨防：
皇冠信用盘出租在单用户形态下相接到SQL Server实例之前，住手SQL Server Agent 工作;不然 SQL Server Agent 工作将使用该相接，从而使其胁制。
在单用户形态下启动SQL Server实例时，SQL Server Management Studio 不错相接到 SQL Server。然而Management Studio中的对象资源处置器可能会失败，因为在某些操作中它需要使用多个相接。若要在单用户形态下处置 SQL Server，不错延伸 Transact-SQL 语句(仅通过 Management Studio 中的查询剪辑器相接)概况使用 sqlcmd 实用器具。
当您将 -m 选项与 sqlcmd 或 Management Studio 集中使用时，不错将相接截止为指定的客户端欺诈设施。举例，-m"sqlcmd" 将相接截止为单个相接而且该相接必须将自身象征为 sqlcmd 客户端设施。当您正在单用户形态下启动 SQL Server 而且未知的客户端欺诈设施正在占用这个唯独的可用相接时，使用此选项。若要通过 Management Studio 中的查询剪辑器进行相接，请使用 -m"Microsoft SQL Server Management Studio - Query"。
如下所示，如若你指定了单用户只不错SQLCMD相接，那么此时，其它通过SSMS等其它神色相接数据库齐会报上头额外，其它通过设施相接过来的相接就不会霸占这个相接了。
C:\Windows\system32>net stop mssqlserver The SQL Server (MSSQLSERVER) service is stopping. The SQL Server (MSSQLSERVER) service was stopped successfully. C:\Windows\system32>net start mssqlserver /m"SQLCMD" The SQL Server (MSSQLSERVER) service is starting. The SQL Server (MSSQLSERVER) service was started successfully. C:\Windows\system32>
如若你指定参数/m"Microsoft SQL Server Management Studio - Query" 那么就会箝制像欺诈设施或SQLCMD登录
C:\Windows\system32>net stop mssqlserver The SQL Server (MSSQLSERVER) service is stopping. The SQL Server (MSSQLSERVER) service was stopped successfully. C:\Windows\system32>net start mssqlserver /m"Microsoft SQL Server Management Studio - Query" The SQL Server (MSSQLSERVER) service is starting. The SQL Server (MSSQLSERVER) service was started successfully. C:\Users>sqlcmd Sqlcmd: Error: Microsoft ODBC Driver 11 for SQL Server : Login failed for user ' xxx'. Reason: Server is in single user mode. Only one administrator c an connect at this time..