一、用户的定义
1.1 用户名+主机域
此处为5.7.2版本的mysql当中password字段已改为authentication_string
mysql> select user,host,authentication_string from user;
+---------------+-----------+-------------------------------------------+
| user | host | authentication_string |
+---------------+-----------+-------------------------------------------+
| root | localhost | *5B11E7BC48365F1019E05077EBDC42BA908B3342 |
| mysql.session | localhost | *THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE |
| mysql.sys | localhost | *THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE |
| shiqi | % | *5B11E7BC48365F1019E05077EBDC42BA908B3342 |
| shiqi | localhost | *5B11E7BC48365F1019E05077EBDC42BA908B3342 |
+---------------+-----------+-------------------------------------------+
5 rows in set (0.02 sec)
1.2 用户作用
1.登录数据库
登录命令为:`mysql -u username -p` 然后输入密码
2.管理数据库和维护数据