mysql新增用户

　　新开了个项目，数据库也想新搞个用户，先登陆mysql，看看原来都有哪些：

root@wlf:/# mysql -uroot -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 76766
Server version: 5.7.26-log MySQL Community Server (GPL)

Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.

mysql> select host,user from mysql.user;
+-----------+---------------+
| host      | user          |
+-----------+---------------+
| %         | backup        |
| %         | hellodevelop     |
| %         | hellocloud       |
| %         | passerby      |
| %         | hellomg         |
| localhost | mysql.session |
| localhost | mysql.sys     |
| localhost | root          |
+-----------+---------------+
8 rows in set (0.00 sec)

　　我们新增一个prize用户：

mysql> create user 'prize'@'%' identified by 'prize';
Query OK, 0 rows affected (0.11 sec)

mysql> select host,user from mysql.user;
+-----------+---------------+
| host      | user          |
+-----------+---------------+
| %         | backup        |
| %         | hellodevelop     |
| %         | hellocloud       |
| %         | passerby      |
| %         | prize         |
| %         | hellomg         |
| localhost | mysql.session |
| localhost | mysql.sys     |
| localhost | root          |
+-----------+---------------+
9 rows in set (0.00 sec)

　　

　　但这会儿新用户是没有任何操作权限的，除了看看：

mysql> show grants for 'prize'@'%';
+-----------------------------------+
| Grants for prize@%                |
+-----------------------------------+
| GRANT USAGE ON *.* TO 'prize'@'%' |
+-----------------------------------+
1 row in set (0.00 sec)

　　

　　所以我们还得给它赋予各种权限：

mysql> grant all privileges on `prize`.* to 'prize'@'%';
Query OK, 0 rows affected (0.04 sec)

mysql> show grants for 'prize'@'%';
+--------------------------------------------------+
| Grants for prize@%                               |
+--------------------------------------------------+
| GRANT USAGE ON *.* TO 'prize'@'%'                |
| GRANT ALL PRIVILEGES ON `prize`.* TO 'prize'@'%' |
+--------------------------------------------------+
2 rows in set (0.00 sec)

　　刷新一下权限：

mysql> flush privileges;
Query OK, 0 rows affected (0.09 sec)

　　现在可以进入prize用户开始我们的倒腾了：

mysql> exit;
Bye
root@d5afa9102517:/# mysql -uprize -pprize
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 77055
Server version: 5.7.26-log MySQL Community Server (GPL)

Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.

mysql> create database prize;
Query OK, 1 row affected (0.09 sec)