Research on Precision Marketing of Real Estate Market Based on Data Mining

Table 1

Table of users’ information.

Field name	Field type	Data length	Primary key/foreign key	Allow to be empty
User ID	Int	32	Primary key	No
Username	Varchar	20	No	No
User type	Varchar	10	No	No
User's real name	Varchar	50	No	Yes
Gender	Byte	1	No	Yes
Age	Int	11	No	Yes
User password	Varchar	50	No	No
E-mail	Varchar	50	No	Yes
Mobile phone	Varchar	20	No	Yes
User information remarks	Varchar	255	No	Yes
Last login time	Datetime	8	No	No
User's current state	Int	32	No	No