Variables:
id - idex of the table: int, auto-increment, not null, primary key
uid - user id: int, auto-increment, not null, primary key
name - name of the item: varchar(255), not null
passwd - user password: varchar(255), not null
avatar - user avatar: longblob, null
email - user email: varchar(100), null
contact - user contact, can be physical or url: varchar(255), null
status - educational status, including degree or job information of the user: varchar(50), null
interest - user interests: varchar(255), null
descrip - user description: text, null
owner - id of the owner: int, not null
issue_date - issue date of the item: date, not null
start_date - start date of the item: date, not null
end_date - end date of the item: date, not null
founder - award/honor issue organization or project founder: varchar(255), not null
info - more information: text, null
visible - visibility of the item: int, 1, not null
location - university location: varchar(255), not null
major - user major: varchar(100), not null
cgpa - user cgpa: float(5,2), not null
gpa_scale - user gpa scale:  float(5,2), not null
gpa_info - more information about user gpa: varchar(50), null
coursework - user coursework: text, null
role - user role in this item: varchar(100), not null
author - authors of the publication: varchar(255), not null
url - url of the item: varchar(255), null

Functions:
block(table_name, user_id)