//CREATE TABLE c_attendance_result_comment (iid int not null PRIMARY KEY AUTO_INCREMENT, attendance_sheet_id int not null, user_id int not null, created_at datetime not null, updated_at datetime not null, comment text not null);
//CREATE TABLE c_attendance_result_comment (iid int not null PRIMARY KEY AUTO_INCREMENT, attendance_sheet_id int not null, user_id int not null, created_at datetime not null, updated_at datetime not null, comment text not null, author_user_id int not null);
//CREATE INDEX c_attendance_sheet_user ON track_e_access_complete (attendance_sheet_id, user_id);