USE master;
GO
DECLARE @SQL VARCHAR(MAX);
SET @SQL=''
SELECT @SQL=@SQL+'; KILL '+RTRIM(SPID) --杀掉该进程
FROM master..sysprocesses
WHERE dbid=DB_ID('cnpc');
EXEC(@SQL);
ALTER DATABASE cnpc SET MULTI_USER; --改成多用户
https://www.cnblogs.com/reailcooker/p/9968169.html