mysql数据库安装及使用常见错误

1、Found option without preceding group in config file

D:\mysql-8.0.17\bin>mysqld --initialize --console

mysqld: [ERROR] Found option without preceding group in config file D:\mysql-8.0.17\my.ini at line 1.
mysqld: [ERROR] Fatal error in defaults handling. Program aborted!

原因：my.ini文件格式是utf-8

解决办法：my.ini文件保存为ANSI格式文件

 

2、Install/Remove of the Service Denied!

解决办法：打开cmd.exe程序的时候选择“用管理员身份打开”。

 

3、MySQL8.0，Navicat连接不上，报错1251

原因是MySQL8.0版本的加密方式和MySQL5.0的不一样，连接会报错。

解决方法

 

C:\Windows\system32>mysql -uroot -p

Enter password: ******

Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 18
Server version: 8.0.11 MySQL Community Server - GPL
Copyright (c) 2000, 2018, 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>

 

 

mysql> use mysql;
Database changed


mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'password' PASSWORD EXPIRE NEVER;
Query OK, 0 rows affected (0.10 sec)


mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password';
Query OK, 0 rows affected (0.35 sec)


mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.28 sec)