集结号起花开万里的博客

CentOS7安装MySQL 下载并安装MySQL官方的 Yum Repository wget -i -c http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm yum -y install mysql57-community-release-el7-10.noarch.rpm yum -y install mysql-community-server MySQL数据库设置 启动MySQL systemctl start

MongoDB常用查询语法及与MySQL对比示例 文章目录MongoDB常用查询语法及与MySQL对比示例一、查询二、曾三、删四、改 一、查询 查询所有 – MYSQL: select * from user; – MongoDB： db.user.find(); 条件查询 – MYSQL: select * from user where name = ‘张三’; – MongoDB： db.user.find({“name”: “张三”}); 多条件查询 – MYSQL: select *