### Database Schema:
CREATE TABLE event (
	event_id	TEXT	NULL	PRIMARY KEY,
	event_name	TEXT	NULL,
	event_date	TEXT	NULL,
	type	TEXT	NULL,
	notes	TEXT	NULL,
	location	TEXT	NULL,
	status	TEXT	NULL
);

CREATE TABLE budget (
	budget_id	TEXT	NULL	PRIMARY KEY,
	category	TEXT	NULL,
	spent	REAL	NULL,
	remaining	REAL	NULL,
	amount	INTEGER	NULL,
	event_status	TEXT	NULL,
	link_to_event	TEXT	NULL,
	foreign key (link_to_event) references event (event_id)
);

CREATE TABLE major (
	major_id	TEXT	NULL	PRIMARY KEY,
	major_name	TEXT	NULL,
	department	TEXT	NULL,
	college	TEXT	NULL
);

CREATE TABLE expense (
	expense_id	TEXT	NULL	PRIMARY KEY,
	expense_description	TEXT	NULL,
	expense_date	TEXT	NULL,
	cost	REAL	NULL,
	approved	TEXT	NULL,
	link_to_member	TEXT	NULL,
	link_to_budget	TEXT	NULL,
	foreign key (link_to_budget) references budget (budget_id),
	foreign key (link_to_member) references member (member_id)
);

CREATE TABLE member (
	member_id	TEXT	NULL	PRIMARY KEY,
	first_name	TEXT	NULL,
	last_name	TEXT	NULL,
	email	TEXT	NULL,
	position	TEXT	NULL,
	t_shirt_size	TEXT	NULL,
	phone	TEXT	NULL,
	zip	INTEGER	NULL,
	link_to_major	TEXT	NULL,
	foreign key (zip) references zip_code (zip_code),
	foreign key (link_to_major) references major (major_id)
);

CREATE TABLE attendance (
	link_to_event	TEXT	NULL	PRIMARY KEY,
	link_to_member	TEXT	NULL	PRIMARY KEY,
	foreign key (link_to_event) references event (event_id),
	foreign key (link_to_member) references member (member_id)
);

CREATE TABLE zip_code (
	zip_code	INTEGER	NULL	PRIMARY KEY,
	type	TEXT	NULL,
	city	TEXT	NULL,
	county	TEXT	NULL,
	state	TEXT	NULL,
	short_state	TEXT	NULL
);

CREATE TABLE income (
	income_id	TEXT	NULL	PRIMARY KEY,
	date_received	TEXT	NULL,
	amount	INTEGER	NULL,
	source	TEXT	NULL,
	notes	TEXT	NULL,
	link_to_member	TEXT	NULL,
	foreign key (link_to_member) references member (member_id)
);

### User's Query:
What is the most popular size of t-shirt ordered by the club members?

### Extra Knowledge:
most popular size of t-shirt ordered refers to MAX(COUNT(t_shirt_size))
SELECT t_shirt_size FROM member GROUP BY t_shirt_size ORDER BY COUNT(t_shirt_size) DESC LIMIT 1