mysql将某数据库的全部权限赋给某用户，提示1044错误Access denied

mysql> grant all privileges on zabbix.* to zabbix@localhost identified by 'zabbix';
ERROR 1044 (42000): Access denied for user 'root'@'localhost' to database 'zabbix'

查看root用户有没有授权权限

mysql> select host,user,grant_priv,Super_priv from mysql.user;
+-----------+----------+------------+------------+
| host      | user     | grant_priv | Super_priv |
+-----------+----------+------------+------------+
| 127.0.0.1 | root     | Y          | Y          |
| localhost | root     | N          | Y          |
| 10.0.3.%  | repluser | N          | N          |
+-----------+----------+------------+------------+
3 rows in set (0.00 sec)

可以看到localhost的grant_priv的值为N，也就是说root用户不能授权给其他用户，所以我们需要把这个值改为Y

mysql> update mysql.user set grant_priv='N' where host='localhost';
Query OK, 0 rows affected (0.00 sec)
Rows matched: 1  Changed: 0  Warnings: 0

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

改完之后最好重启一下服务器（我没重启，所以还是报那个错，重启后就正常了）

mysql> select user,host,Grant_priv,super_priv from mysql.user;
+----------+-----------+------------+------------+
| user     | host      | Grant_priv | super_priv |
+----------+-----------+------------+------------+
| root     | 127.0.0.1 | Y          | Y          |
| root     | localhost | Y          | Y          |
| repluser | 10.0.3.%  | N          | N          |
+----------+-----------+------------+------------+
3 rows in set (0.00 sec)

mysql> grant all privileges on zabbix.* to zabbix@localhost identified by 'zabbix';
Query OK, 0 rows affected (0.00 sec)

mysql>