摘要：
视图创建视图的sql语句：create view user as select a.name,a.age,b.sex from usera as a, userb as b where a.name=b.name;定义视图，以V_开头 create view 视图名称 as select 语句查看视 阅读全文
摘要：
mysql主从配置yum配置一 安装mariadb数据库10.3版本[mariadb]name=MariaDBbaseurl=http://mirrors.ustc.edu.cn/mariadb/yum/10.3/centos7-amd64/gpgkey=http://mirrors.ustc.ed 阅读全文