[Retracted] Optimization of Online Course Platform for Piano Preschool Education Based on Internet Cloud Computing System

Table 1

Parent table.

Field	Type of data	Remark
Id	int (ll)	Primary key id of the table
openid	varchar (64)	WeChat openid
Sign_up_time	datetime	Registration time
phone_number	varchar (20)	phone number
avatar	varchar (255)	Avatar URL
name	varchar (20)	Name