Update mysql5.6 to 5.7 under Windows

Upgrade steps

1. download Mysql5.7

2. Backing up old databases

   mysqldump -uroot -p123456 --all-databases > all_db.sql
   

3. Out of Service

   net stop Mysql
   # Mysql  Replace with the service name in the computer 
   #  Waiting to appear  MySQL  Service successfully stopped .
   

4. Delete service

   In old database bin Open the command line in the directory

   mysqld --remove Mysql
   # Mysql  Replace with the service name in the computer 
   #  Waiting to appear  Service successfully removed.
   

5. Unzip downloaded zip package

6. Modify environment variables

   take 5.6 The version environment variable is changed to 5.7 edition bin Catalog

7. newly build my.ini file

   [mysql]
   #  Set up mysql Client default character set 
   default-character-set=utf8 
   [mysqld]
   # Set up 3306 port 
   port = 3306 
   #  Set up mysql Installation directory 
   basedir=D:\Program Files\MySQL\mysql-5.7.31-winx64
   #  Set up mysql Database data storage directory 
   datadir=D:\Program Files\MySQL\mysql-5.7.31-winx64\data
   #  Maximum connections allowed 
   max_connections=200
   #  The character set used by the server defaults to 8 Bit coded latin1 Character set 
   character-set-server=utf8
   #  The default storage engine that will be used when creating a new table 
   default-storage-engine=INNODB
   sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES 
   

8. Initialize database

   stay 5.7 edition bin Open command line in directory

   mysqld --initialize --console
   

9. Installation services

   mysqld install
   

10. Start the service

    net start mysql
    # MySQL  Service started successfully .
    

11. modify my.ini file , Skip password verification

    #  Add a row 
    skip-grant-tables
    

12. Restart the service

    net stop mysql
    # MySQL  Service successfully stopped .
    net start mysql
    # MySQL  Service started successfully .
    

13. Get into mysql Change Password

    mysql
    

    use mysql;
    update user set authentication_string=password("123456") where user="root";
    # 123456  Replace with your new password 
    flush privileges;
    quit;
    

14. modify my.ini file , Remove skip password verification

    #  Get rid of this line 
    skip-grant-tables
    

15. Restart the service

    net stop mysql
    # MySQL  Service successfully stopped .
    net start mysql
    # MySQL  Service started successfully .
    

16. Log in with the new password mysql, Turn on remote login

    mysql -uroot -p123456
    

    alter user 'root'@'localhost' identified by '123456';
    # 123456  Replace with your new password 
    use mysql;
    update user set host='%' where user='root';
    flush privileges;
    quit;
    

17. Restore data

    mysql -uroot -p123456 < all_db.sql
    #  The long wait began 
    

---

An error is reported when exporting the database after upgrading

1577 - Cannot proceed because system tables used by Event Scheduler were found damaged at server start

solve ：

mysqlcheck -uroot -p123456 --all-databases --check-upgrade --auto-repair
#123456 Password for database 
mysql_upgrade -uroot -p123456

Restart after mysql service

net stop mysql
net start mysql

Reference material

【MySQL】Windows Next mysql5.6 Upgrade to 5.7 Methods

Solve the problem of exporting database errors