还原SQL server失败导致单个用户

https://jingyan.baidu.com/article/20095761ca8343cb0721b4fb.html

还原SQL server失败导致单个用户问题：

DECLARE @SQL VARCHAR(MAX); 
SET @SQL='' 
SELECT @SQL=@SQL+'; KILL '+RTRIM(SPID) 
FROM master..sysprocesses 
WHERE dbid=DB_ID('DEV_SMM_LB'); 
EXEC(@SQL);
ALTER DATABASE DEV_SMM_LB SET MULTI_USER