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优化 通过带索引的去查

navicat远程连接不上mysql开放远程连接权限[root@VM-4-17-centos etc]# mysql -u root -pEnter password:Welcome to the MySQL monitor. Commands end with ; or \g.Your MySQL connection id is 5Server version: 5.7.38 MySQL Community Server (GPL)Copyright (c) 2000, 2022,

1.下载rpm安装包[root@VM-4-17-centos ~]# wget https://repo.mysql.com/mysql57-community-release-el7.rpm--2022-05-11 00:08:38-- https://repo.mysql.com/mysql57-community-release-el7.rpmResolving repo.mysql.com (repo.mysql.com)... 104.90.24.228Connecting to rep