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, 輸入root密碼，初始爲空。

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

5. mysql -uroot -ptianyun; 創建數據庫

6. show databases;

   create database concats; show databases;

7. 導入數據庫： 

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

   或者：

   use concats; select database();

   source /home/student/mariadb.dump;

   show tables; 可以看到一張相應的表

8. 授權用戶訪問， 可能要指定網段

   help grant; 查看授權命令

   grant select (limitation list) on concats.* to 'luigi@'% 

9. flush privileges 刷新權限列表（系統關鍵字不分大小寫，表名和庫名分大小寫）

10. mysql -uluigi -h 172.25.0.11 -ptianyun

    use concats; select * from product;

11. 單表查詢：

    1. desc product \G 或 desc product;  查看錶結構

    2. select * from product where id_category='2'

    3. select count(*) from product where id...

    4. select * from product where ... and ... 下劃線_表示匹配一個字符，%表示多個

    5. select * from product where name regexp '^T'; 正則表達式