Upgrade MySQL5.7

Because Django perform the migration table to generate an error had upgraded version

1, download the official mysql5.7.27 zip file, official address: https: //dev.mysql.com/downloads/windows/installer/5.7.html

2, extract, add environment variables to extract the position

3, uninstall the original database

(Note that the original date put back out)

Remove the registry

Use CCleanerProPlus perfect easily remove

Delete Service

Command sc delete mysql, mysql delete the reference address https://blog.csdn.net/qq_39701269/article/details/77935490

4, installation

1. Create a file called "my.ini" in the root directory of MySQL, this document is MySQL configuration file

[mysql]

# 设置mysql客户端默认字符集

default -character- set =utf8

[mysqld]

# 设置mysql的安装目录

basedir = D:\Mysql5.29\mysql-5.7.29-winx64

# 设置mysql数据库的数据的存放目录

datadir = D:\Mysql5.29\mysql-5.7.29-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

# 如果需要的存储引擎被禁用或未编译，可以防止自动替换存储引擎

# 为事务存储引擎启用严格模式，也可能为非事务存储引擎启用严格模式

sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

# 开启查询缓存

explicit_defaults_for_timestamp= true

2. Install Mysql command

mysqld install MySQL --defaults-file= "D:\Mysql5.29\mysql-5.7.29-winx64\my-default.ini"

3. initialization

mysqld --initialize --user=mysql --console #初始化获取root随机密码 “root @localhost ”后的随机字符串就是root的临时密码。

4. Start command: net start MySQL

5. Start a command console, type "mysql -u root -p", carriage return, you will be prompted for a password, enter the temporary password Step 3

6. The temporary password before entering the mysql input: mysql -u root -p

7. Set the new root password

set password = password ( 'password');

5, restore the original data

Copy the data folder over the original date

Replace the log table space

So far mysql upgrade is complete! ! !