What should I do if the initialization of the mysql database fails?

The solution to the failure to initialize the mysql database: first find and open the my.ini file; then comment out the datadir in the my.ini file; finally replace UTF8 with UTF8MB4 according to the prompt.

When the database is initialized, the command line error is as follows:

C:\mysql-8.0.17-winx64  \bin>mysqld --initialize --console
 2019-08-24T13:33:22.622321Z 0 [System] [MY-013169] [Server] C:\mysql-8.0.17-winx64\bin\mysqld.exe (mysqld 8.0.17) initializing of server in progress as  process 8404
 2019-08-24T13:33:22.624188Z 0 [Warning] [MY-013243] [Server] --character-set-server: The character set UTF8MB3 is deprecated and will be removed in a future release. Please consider using UTF8MB4 instead  .
 2019-08-24T13:33:22.625619Z 0 [ERROR] [MY-010457] [Server] --initialize specified but the data directory has files in it. Aborting.
 2019-08-24T13:33:22.625635Z 0 [ERROR] [MY-013236] [Server] The designated data directory C:\mysql-8.0.17-winx64\data\ is unusable. You can remove all files that the server  added to it.
 2019-08-24T13:33:22.643590Z 0 [ERROR] [MY-010119] [Server] Aborting
 2019-08-24T13:33:22.643744Z 0 [System] [MY-010910] [Server] C:\mysql-8.0.17-winx64\bin\mysqld.exe: Shutdown complete (mysqld 8.0.17) MySQL Community Server  - GPL.

General process

C:\mysql-8.0.17-winx64\bin>mysqld --initialize --  console
 2019-08-24T13:37:11.590803Z 0 [System] [MY-013169] [Server] C:\mysql-8.0.17-winx64\bin\mysqld.exe (mysqld 8.0.17) initializing of server in progress as  process 2484
 2019-08-24T13:37:15.862830Z 5 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: 37swG%65Qjf1
 2019-08-24T13:37:17.783854Z 0 [System] [MY-013170] [Server] C:\mysql-8.0.17-winx64\bin\mysqld.exe (mysqld 8.0.17) initializing of server has completed

 C:\mysql-8.0.17-winx64\bin>mysqld --install
 The service already exists!
 The current server installed: C:\mysql-8.0.17-winx64\bin\mysqld.exe MySQL

 C:\mysql-8.0.17-winx64\bin>net start mysql
 The MySQL service is starting.
 The MySQL service has been started successfully.


 C:\mysql-8.0.17-winx64\bin>mysql -u root -p
 Enter password: *************
 Welcome to the MySQL monitor. Commands end with ; or \g.
 Your MySQL connection id is 8
 Server version: 8.0.17

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 Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

 mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '111111';
 Query OK, 0 rows affected (0.01 sec)

 mysql>

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