新建查询，直接执行下面语句创建存储过程：

USE [master]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
  --建一个存储过程，断开所有用户连接。  
  create   proc   [dbo].[killspid]   (@dbname   varchar(20))  
  as  
  begin  
  declare   @sql   nvarchar(500)  
  declare   @spid   int  
  set   @sql='declare   getspid   cursor   for    
  select   spid   from   sysprocesses   where   dbid=db_id('''+@dbname+''')'  
  exec   (@sql)  
  open   getspid  
  fetch   next   from   getspid   into   @spid  
  while   @@fetch_status<>-1  
  begin  
  exec('kill   '+@spid)  
  fetch   next   from   getspid   into   @spid  
  end  
  close   getspid  
  deallocate   getspid  
  end  
GO

先在master中创建一个存储过程，用于干掉所有连接，然后执行下面语句调用

use   master   
exec   killspid   '出问题的数据库名'

转载自:https://www.cnblogs.com/zqh-/p/7412663.html