Statement:
Select * from reg
Insert into reg (loginname, name, password) values (' Tom ', 'Tom', 'Tom')
The official document query: https://mariadb.com/kb/en/mariadb-error-codes/#shared-mariadbmysql-error-codes
Change:
Select * from reg;
Insert into reg (loginname, ` name `, ` password `) values (' Tom ', 'Tom', 'Tom');
Problem solving!
