错误代码： 1449 The user specified as a definer ('root'@'%') does not exist

1、错误描述

D:\MySQL\Program Files\MySQL\MySQL Server 5.6\bin>mysqldump --all-databases -uroot -p > all_databases.sql
Enter password: **************
mysqldump: Got error: 1449: The user specified as a definer ('root'@'%') doe
s not exist when using LOCK TABLES

D:\MySQL\Program Files\MySQL\MySQL Server 5.6\bin>
D:\MySQL\Program Files\MySQL\MySQL Server 5.6\bin>
D:\MySQL\Program Files\MySQL\MySQL Server 5.6\bin>
D:\MySQL\Program Files\MySQL\MySQL Server 5.6\bin>
D:\MySQL\Program Files\MySQL\MySQL Server 5.6\bin>
D:\MySQL\Program Files\MySQL\MySQL Server 5.6\bin>
D:\MySQL\Program Files\MySQL\MySQL Server 5.6\bin>

2、错误原因

    这是权限问题，授权给root的所有的SQL语句

3、解决办法

GRANT ALL PRIVILEGES ON *.* TO root@"%" IDENTIFIED BY ".";

FLUSH PRIVILEGES;