Mysql installation step on pit notes

Mysql install uninstall several times and finally succeeded, he stepped on the record about the pit

Into the pit

The first is the official website to download version 8.0.18

starting at the time of installation to the end of the server always unsuccessful

log display problems

MySQL error 1042: Unable to connect to any of the specified MySQL hosts.
Failed to connect to MySQL Server 8.0.18 after 10 attempts.
Ended configuration step: Starting the server

Then look at the recommendations of friends, find mysql80 service, right> properties> log on, change the cost to the system account> OK, re-run success, but I did not succeed
portal

---

Then uninstall, version 5.7.28 Download low
I was in accordance with the recommendations of friends unloading Portal
but I uninstall process no other extra steps, just uninstall is complete, additional steps I have checked, and no extra files .
C: \ Documents and Settings directory needs to show uncheck Hide protected file, and then give full control

Download version 5.7

Download the compressed version, you will be able to directly extract

• After decompression, My Documents directory
  D: \ Users \ Jsong \ tools \ Mysql \ mysql-5.7.22-winx64
• New my.ini file in this directory, choose the encoding format ANSI format encoding
  nodepad format> encoded in ANSI format

[mysql]
# 设置mysql客户端默认字符集
default-character-set=utf8
[mysqld]
#设置3306端口
port = 3306
# 设置mysql的安装目录
basedir=D:\\Users\\Jsong\\tools\\Mysql\\mysql-5.7.22-winx64

datadir=D:\\Users\\Jsong\\tools\\Mysql\\mysql-5.7.22-winx64\\data
# 允许最大连接数
max_connections=200
# 服务端使用的字符集默认为8比特编码的latin1字符集
character-set-server=utf8
# 创建新表时将使用的默认存储引擎
default-storage-engine=INNODB

Note To use \\
the basedir = D: \\ \\ Jsong the Users Tools \\ \\ \\ Mysql MySQL-5.7.22-Winx64
DATADIR = D: \\ \\ Jsong the Users Tools \\ \\ \\ Mysql MySQL- 5.7.22-winx64 \\ data

Otherwise Mysql initialization of have this problem

mysqld: Can't create/write to file 'D:\Users\Jsong      ools\Mysql\mysql-5.7.22-winx64\data\is_writable' (Errcode: 2 - No such file or directory)
2019-11-09T02:16:53.861687Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2019-11-09T02:16:53.862353Z 0 [ERROR] Can't find error-message file 'D:\Users\Jsong     ools\Mysql\mysql-5.7.22-winx64\share\errmsg.sys'. Check error-message file location and 'lc-messages-dir' configuration directive.
2019-11-09T02:16:53.864165Z 0 [ERROR] --initialize specified but the data directory exists and is not writable. Aborting.
2019-11-09T02:16:53.864376Z 0 [ERROR] Aborting

• Installed
  in the D: \ Users \ Jsong \ tools \ Mysql \ mysql-5.7.22-winx64 \ bin directory to perform

mysqld install

The emergence of new problems
could not start (0xc000007b) normal
download driectx
refer to this article

• Initialize the database
  will be in D: \ Users \ Jsong \ tools \ Mysql \ data folder to generate a database file \ mysql-5.7.22-winx64

mysqld --initialize

• Kai Services

net start mysql

• Connect to the database

mysql -u{username} -p{password}

• Check the root user password
  D: \ Users \ Jsong \ tools \ Mysql \ mysql-5.7.22-winx64 \ data \ xxx.err
  file written secret root @ localhost: 7lKyqqMt 0TU!

2019-11-09T02:19:16.178984Z 1 [Note] A temporary password is generated for root@localhost: 7lKyqqMt!0TU

• log in

mysql -uroot -p7lKyqqMt!0TU

D:\Users\Jsong\tools\Mysql\mysql-5.7.22-winx64\bin>mysql -uroot -p7lKyqqMt!0TU
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 15
Server version: 5.7.22

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.

• change Password

alter user root@localhost identified by ‘1’;

mysql> alter user root@localhost identified by '1';
Query OK, 0 rows affected (0.00 sec)

• drop out

exit;

• Out of service

net stop mysql