Today I want to add a library to mysql and do some exercises on the table
The sql is as follows: CREATE DATABASE wjtest; #New library
After running, there is a prompt message:
It is caused by the fact that mysql is not installed on the computer, so you need to download a mysql first (Win10 system Lenovo as an example)
https://www.mysql.com/ mysql official website URL
After downloading, unzip and copy the path
run cmd as administrator
cd to the bin directory
The following is the prompt for successful installation of the installation service
Next enter mysqld --initialize --console to initialize mysql
After the initialization is successful, there will be a password to pay attention to
net start Mysql start service
Log in to test whether it has been installed and configured: enter mysql -u root -p and press Enter to copy the password above and press Enter
Modify password: alter user 'root'@'localhost' identified by 'new password';
exit at startup once
Enter the password you just updated: 123456
The installation is complete.
Encountered when connecting: Authentication plugin 'caching_sha2_password' cannot be loaded error because: the encryption rules have changed
Use: ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password'; Reset the password and connect to OK
Go back to the original question and create a new library
reboot 
new library 
create table userinfo(
id int COMMENT'primary key id',
user_name char(10) COMMENT'user name',
city_id int COMMENT 'city id',
user_status int COMMENT 'user status',
creat_time DOUBLE COMMENT'add time');
Create a new table 
Then create some data. . You can start typing sql!