windows安装MySQL启动服务后，使用root登不上去怎么办？

Posted 2023-05-14

首次登录就要我输入密码，我也没设置啊，配置文件my.ini添加skip-grant-tables也没用.
怎么办？
我已经找到了问题了，个别情况，在data文件夹下有个.err文件当中有系统生成的初始密码。A temporary password is generated for root@localhost: xxx，用这个就可以登进去了。谢谢你们！

首次使用要设置root密码的，mysql -u root -p 具体忘了。呵呵 参考技术A 首次登陆密码为空 直接回车就可以本回答被提问者采纳

Windows 10 下mysql 安装后无法启动问题

安装过程：

1. 官网下载5.15.7， http://dev.mysql.com/downloads/， 选择开源社区版：MySQL Community Server (GPL)

2. 我解压后放在 E:\mysql\5.7.15\ 下面

3. 将E:\mysql\5.7.15\bin加入系统path

4. 安装mysql服务: mysqld --install

5. 编辑E:\mysql\5.7.15\my.ini文件

# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html
# *** DO NOT EDIT THIS FILE. It‘s a template which will be copied to the
# *** default location during install, and will be replaced if you
# *** upgrade to a newer version of MySQL.

[mysqld]

basedir = E:/mysql/5.7.15
datadir = E:/mysql/data
port = 3306

sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES 

6. 用管理员身份打开cmd命令窗口

7. 初始化mysql: mysqld --initialize

8. 启动mysql服务： net start mysql

====================================================================

遇到的问题：

问题1： 

E:\mysql\5.7.15>net start mysql
MySQL 服务正在启动 .
MySQL 服务无法启动。

服务没有报告任何错误。

请键入 NET HELPMSG 3534 以获得更多的帮助。


E:\mysql\5.7.15>net helpmsg 3534

服务没有报告任何错误。

问题2： 

这个错误没有仍和日志记录，原因是my.ini中datadir所设定的目录不存在，路径分隔符需要采用linux格式“/”, 而不是“\"

如果mysql找不到这个data目录, 那么初始化会出错：

E:\mysql\5.7.15\bin>mysqld --initialize
mysqld: Can‘t create directory ‘E:\myusql\data\‘ (Errcode: 2 - No such file or directory)
2016-09-16T07:52:37.476808Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2016-09-16T07:52:37.476808Z 0 [Warning] ‘NO_ZERO_DATE‘, ‘NO_ZERO_IN_DATE‘ and ‘ERROR_FOR_DIVISION_BY_ZERO‘ sql modes should be used with strict mode. They will be merged with strict mode in a future release.
2016-09-16T07:52:37.476808Z 0 [Warning] ‘NO_AUTO_CREATE_USER‘ sql mode was not set.
2016-09-16T07:52:37.492808Z 0 [ERROR] Aborting

问题3： data目录非空，也会初始化也会出错：

E:\mysql\5.7.15\bin>mysqld --initialize
2016-09-16T07:53:33.306817Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2016-09-16T07:53:33.306817Z 0 [Warning] ‘NO_ZERO_DATE‘, ‘NO_ZERO_IN_DATE‘ and ‘ERROR_FOR_DIVISION_BY_ZERO‘ sql modes should be used with strict mode. They will be merged with strict mode in a future release.
2016-09-16T07:53:33.306817Z 0 [Warning] ‘NO_AUTO_CREATE_USER‘ sql mode was not set.
2016-09-16T07:53:33.310106Z 0 [ERROR] --initialize specified but the data directory has files in it. Aborting.
2016-09-16T07:53:33.318664Z 0 [ERROR] Aborting