摘要：
问题 CentOS 8 yum安装软件时，提示无法从AppStream下载 [root@C8-3 ~]# yum -y install httpd mariadb-server mariadb php php-mysql Repository AppStream is listed more tha 阅读全文
摘要：
1、创建只读角色 CREATE ROLE readaccess; 2、授予对现有表的访问权限 GRANT USAGE ON SCHEMA public TO readaccess; GRANT SELECT ON ALL TABLES IN SCHEMA public TO readaccess; 阅读全文