SQL Server 断开某个数据库所有连接（还原的时候需要）

USE master
GO
ALTER DATABASE [DBName] SET SINGLE_USER WITH ROLLBACK IMMEDIATE
GO
--查看是否还有用户连接
SELECT * FROM sys.[sysprocesses] WHERE DB_NAME([dbid])='DBName'
GO
ALTER DATABASE [DBName] SET MULTI_USER
GO