RHCE7.0答案之Mariadb

Mariadb配置：

1. yum groupinstall mariadb mariadb-client

   yum grouplist |grep maria

2. systemctl enable mariadb.service

   systemctl restart mariadb.service

3. firewall-cmd --permanent --add-service=mysql

   firewall-cmd --reload

   firewall-cmd --permanent --list-all

4. mysql_secure_installation, 输入root密码，初始为空。

   set root password->Remove anon user?yes->Disallow root login?yes->Remove test database?yes->Reload?yes

5. mysql -uroot -ptianyun; 创建数据库
6. show databases;

   create database concats; show databases;

7. 导入数据库：

   mysql -uroot -ptianyun concats < /home/student/mariadb.dump

   或者：

   use concats; select database();

   source /home/student/mariadb.dump;

   show tables; 可以看到一张相应的表

8. 授权用户访问， 可能要指定网段

   help grant; 查看授权命令

   grant select (limitation list) on concats.* to ‘[email protected]‘%

9. flush privileges 刷新权限列表（系统关键字不分大小写，表名和库名分大小写）
10. mysql -uluigi -h 172.25.0.11 -ptianyun

    use concats; select * from product;

11. 单表查询：
    1. desc product \G 或 desc product;  查看表结构
    2. select * from product where id_category=‘2‘
    3. select count(*) from product where id...
    4. select * from product where ... and ... 下划线_表示匹配一个字符，%表示多个
    5. select * from product where name regexp ‘^T‘; 正则表达式