摘要:
一、输入 netstat -aon 列出所有端口的情况二、查看被占用端口的PID ,命令为:netstat -aon|findstr "80"三、输入tasklist|findstr "2668",查看哪个进程占用了2668 阅读全文
摘要:
一、(1)分组查询语句的顺序 select ... from ... where ... group by ... having ... order by ...注意: where-->group by分组-->执行组函数-->having筛选->order by 如果select/ha... 阅读全文