按照我之前安裝5.6的安裝方法（MySQL免安裝版下載與配置）安裝5.7的時候出現問題：
mysql服務無法啟動，服務沒有報任何錯誤
其實在這學期開始學習mysql的時候，就聽老師同學說，登錄不了的問題，當時沒有在意，也是因為電腦上早就安裝了mysql5.6，也就沒有在意這個問題。這兩天win10系統出問題，重裝了win7，安裝5.7的時候出現了這個問題。
之前的版本默認密碼為空，具體版本不太清楚，反正5.6密碼是空。5.7的安全性提升，在linux安裝5.7的時候，安裝完成後會生成一個隨機性密碼，存儲在root/.mysql_secret中，如果沒有這個文件，去系統日志中查找password，就應該能找到。
但是windows下就不知道如何解決了，不過最後還是找到了解決方法。
解決方法：
來自：windows MySql 5.7.9，啟動不了。缺少data
然而並不是缺少data文件夾，將my-default.ini文件改名為my.ini，移動到bin/目錄下，在bin/下執行命令 mysqld --initialize --user=mysql --console ，這條命令估計是初始化的命令
然後啟動服務 net start mysql
命令行顯示貼在這
Microsoft Windows [版本 6.1.7601] 版權所有 (c) 2009 Microsoft Corporation。保留所有權利。 C:\Windows\system32>cd .. C:\Windows>cd .. C:\>cd mysql-5.7.13-winx64/Boot 系統找不到指定的路徑。 C:\>cd mysql-5.7.13-winx64\bin C:\mysql-5.7.13-winx64\bin>mysqld install Service successfully installed. C:\mysql-5.7.13-winx64\bin>net start mysql MySQL 服務正在啟動 . MySQL 服務無法啟動。 服務沒有報告任何錯誤。 請鍵入 NET HELPMSG 3534 以獲得更多的幫助。 C:\mysql-5.7.13-winx64\bin>net start mysql MySQL 服務正在啟動 . MySQL 服務無法啟動。 服務沒有報告任何錯誤。 請鍵入 NET HELPMSG 3534 以獲得更多的幫助。 C:\mysql-5.7.13-winx64\bin>mysqld --initialize --user=mysql --console 2016-06-21T14:07:20.922112Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see doc umentation for more details). 2016-06-21T14:07:22.669315Z 0 [Warning] InnoDB: New log files created, LSN=45790 2016-06-21T14:07:23.106116Z 0 [Warning] InnoDB: Creating foreign key constraint system tables. 2016-06-21T14:07:23.308916Z 0 [Warning] No existing UUID has been found, so we a ssume that this is the first time that this server has been started. Generating a new UUID: 79c8386d-37b9-11e6-9709-74867a6179b7. 2016-06-21T14:07:23.340116Z 0 [Warning] Gtid table is not ready to be used. Tabl e 'mysql.gtid_executed' cannot be opened. 2016-06-21T14:07:23.355716Z 1 [Note] A temporary password is generated for root@ localhost: rr9.8h74twfR C:\mysql-5.7.13-winx64\bin>mysql -uroot -prr9.8h74twfR mysql: [Warning] Using a password on the command line interface can be insecure. ERROR 2003 (HY000): Can't connect to MySQL server on 'localhost' (10061) C:\mysql-5.7.13-winx64\bin>net start mysql MySQL 服務正在啟動 . MySQL 服務已經啟動成功。 C:\mysql-5.7.13-winx64\bin>mysql -uroot -prr9.8h74twfR mysql: [Warning] Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 2 Server version: 5.7.13 Copyright (c) 2000, 2016, 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> set password=password(''); Query OK, 0 rows affected, 1 warning (0.00 sec) mysql> exit Bye C:\mysql-5.7.13-winx64\bin>mysql -uroot Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 3 Server version: 5.7.13 MySQL Community Server (GPL) Copyright (c) 2000, 2016, 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> exit Bye C:\mysql-5.7.13-winx64\bin> View Code
