作为root @ localhost

mysql> CREATE USER 'aaa'@'%';
Query OK, 0 rows affected (0.00 sec)

mysql> GRANT USAGE ON * . * TO 'aaa'@'%' WITH MAX_QUERIES_PER_HOUR 0 MAX_CONNECTIONS_PER_HOUR 0 MAX_UPDATES_PER_HOUR 0 MAX_USER_CONNECTIONS 0 ;
Query OK, 0 rows affected (0.00 sec)

mysql> CREATE DATABASE IF NOT EXISTS `aaa` ;
Query OK, 1 row affected (0.00 sec)

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)

mysql> GRANT ALL PRIVILEGES ON `aaa` . * TO 'aaa'@'%';
ERROR 1044 (42000): Access denied for user 'root'@'localhost' to database 'aaa'

发生了什么..为什么它会给我这个错误？

mysql> show grants;
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Grants for root@localhost                                                                                                                                                                                                                                                                                                                                                                                        |
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, RELOAD, SHUTDOWN, PROCESS, FILE, REFERENCES, INDEX, ALTER, SHOW DATABASES, SUPER, CREATE TEMPORARY TABLES, LOCK TABLES, EXECUTE, REPLICATION SLAVE, REPLICATION CLIENT, CREATE VIEW, SHOW VIEW, CREATE ROUTINE, ALTER ROUTINE, CREATE USER ON *.* TO 'root'@'localhost' IDENTIFIED BY PASSWORD '*B67132C4A56F2FFFE0AA531DECF0C98895F9CB9B' WITH GRANT OPTION |
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

解决方法:

这是不够的特权.您正尝试授予所有权限.但是,用户’root’@’localhost’没有所有权限.

‘SHOW GRANTS’命令输出了一系列权限 – GRANT SELECT,INSERT,…

但它应该是这样的 – 授予所有特权*.*来’root’@’localhost’…

首先授予root帐户所有权限,或者只授予未授予的权限.