【MySQL】各种常规有用操作收集...

1. MySQL查询所有连接的IP地址指令
   select SUBSTRING_INDEX(host,':',1) as ip , count(*) from information_schema.processlist group by ip;
SELECT substring_index(host, ':',1) AS host_name,state,count(*) FROM information_schema.processlist GROUP BY state,host_name;

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