Effectiveness of Network Classroom Teaching Based on Genetic Algorithm

Table 2

System user information.

Title	Data type	Whether it is empty	Annotation
User_id	int(11)	No	User ID
Username	varchar(100)	No	Account
Password	varchar(200)	No	Password
Nick_name	varchar(200)	No	Character name
Avatar	varchar(200)	Yes	Avatar
Sex	int(11)	Yes	Gender
Phone	varchar(200)	Yes	Telephone
E-mail	varchar(200)	Yes	Mail
E-mail_verified	int(1)	No	E-mail verification
true_name	varchar(200)	Yes	Actual name
Id_card	varchar(200)	Yes	ID card
Birthday	Date	Yes	Birthday
Introduction	varchar(200)	Yes	Brief introduction
Organization_id	int(11)	Yes	Work ID
State	int(11)	No	State
Deleted	int(11)	No	Delete or not
Knowledge	int(11)	Yes	Only
Degree	int(11)	Yes	degree of difficulty
Target	int(11)	Yes	Expected goal
Create_time	timestamp(0)	No	Registration time
Update_time	timestamp(0)	No	Change the time