1、重新修改密码，语句如下：
mysql> alter user 'root'@'localhost' identified by '123'; Query OK, 0 rows affected (0.00 sec) mysql> alter user 'root'@'
阅读背景：
mysql 5.7密码报错 ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
来源：互联网
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