一台计算机上同时安装了python2.7和python3.7。现在为python2.7安装numpy包。失败:error: Unable to find vcvarsall.bat下载安装 Microsoft Visual C Compiler for Python 2.7user installations are disabled via policy on the machine.安装之后:C:\U…
处理方式有如下三种:1.查询不是sleep或者有状态的sqlselect * from information_schema.processlist where command !Sleep or state !2.查询运行中的事务select trx_state, trx_started, trx_mysql_thread_id, trx_query from information_schema.innodb_trx3.查看…