ERROR 1044 (42000)Access denied for user @localhost to database

ERROR 1044 (42000): Access denied for user ”@’localhost’ to database ‘demo’

mysql> create database sufadi;
ERROR 1044 (42000): Access denied for user ''@'localhost' to database 'sufadi'

原因

D:\python3-webapp-Su\www>mysql -u root -p
Enter password: ******
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 48
Server version: 5.6.24 MySQL Community Server (GPL)

Copyright (c) 2000, 2015, 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.

设置密码

管理员身份运行

设置密码

mysql> UPDATE user SET Password=PASSWORD('123456') WHERE user='root';
Query OK, 3 rows affected (0.03 sec)
Rows matched: 3  Changed: 3  Warnings: 0

刷新一下

mysql> flush privileges
-> ;
Query OK, 0 rows affected (0.01 sec)

cmd窗口重新登陆一下

C:\Users\admin>mysql -u root -p
Enter password:

C:\Users\admin>mysql -u root -p
Enter password: ******
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 49
Server version: 5.6.24 MySQL Community Server (GPL)

Copyright (c) 2000, 2015, 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>

建立一个数据库

mysql> create database pythondb;
Query OK, 1 row affected (0.01 sec)

show databases

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| demo               |
| mysql              |
| performance_schema |
| pythondb           |
| sufadi             |
| test               |
+--------------------+
7 rows in set (0.00 sec)