sql从单用户模式恢复到多用户模式

USE master;
GO
DECLARE @SQL VARCHAR(MAX);
SET @SQL=''
SELECT @SQL=@SQL+'; KILL '+RTRIM(SPID)FROM sysprocesses WHERE dbid=DB_ID('MobileDB3.1');EXEC(@SQL);
GO
ALTER DATABASE [MobileDB3.1] SET MULTI_USER;