Database: student_club (difficulty: simple)
Question: Calculate the amount budgeted for 'Registration' event. List all the budgeted categories for said event in an ascending order based on their amount budgeted.
SQL: SELECT T2.category, SUM(T2.amount) FROM event AS T1 JOIN budget AS T2 ON T1.event_id = T2.link_to_event WHERE T1.event_name = 'Registration' GROUP BY T2.category ORDER BY SUM(T2.amount) ASC