mysq5.7.30l root密码修改 error1819

------修改密码策略密码长度

mysql> set global validate_password_policy=0;

Query OK, 0 rows affected (0.00 sec)

mysql> set global validate_password_length=4;

Query OK, 0 rows affected (0.00 sec)

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'nancy';

Query OK, 0 rows affected (0.01 sec)