这篇文章主要介绍MySQL如何实现用户创建，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！
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mysql> create database test;
Query OK, 1 row affected (0.00 sec)
mysql>
mysql> create user 'chenyj'@'*' identified by 'chenyj';
Query OK, 0 rows affected (0.01 sec)
mysql>
mysql> grant all on test.* to chenyj@'*';
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)
mysql>
mysql> grant all on test.* to 'chenyj'@'*';
Query OK, 0 rows affected (0.01 sec)
mysql> grant connect to 'chenyj'@'*';
ERROR 3523 (HY000): Unknown authorization ID `connect`@`%`
mysql>
mysql> create user 'chenyj'@'%' identified by 'chenyj';
Query OK, 0 rows affected (0.01 sec)
mysql>
mysql> grant all on test.* to 'chenyj'@'%';
Query OK, 0 rows affected (0.01 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
测试：
[root@mysql8-01 ~]# mysql -h localhost -u chenyj -p
Enter password:
ERROR 1045 (28000): Access denied for user 'chenyj'@'localhost' (using password: YES)
[root@mysql8-01 ~]#
[root@mysql8-01 ~]# mysql -h localhost -u chenyj -p
Enter password:
ERROR 1045 (28000): Access denied for user 'chenyj'@'localhost' (using password: YES)
[root@mysql8-01 ~]# mysql -h localhost -u chenyj -p
Enter password:
ERROR 1045 (28000): Access denied for user 'chenyj'@'localhost' (using password: YES)
[root@mysql8-01 ~]#
[root@mysql8-01 ~]# mysql -h localhost -u chenyj -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 13
Server version: 8.0.14 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>
mysql>
需要注意的是通配符应该采用'%'
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