Database: planet_1
Question: What are the names of all planets tjat have a total shipment weight greater than 30?
SQL:
SELECT T3.Name FROM PACKAGE AS T1 JOIN Shipment AS T2 ON T1.Shipment = T2.ShipmentID JOIN Planet AS T3 ON T2.Planet = T3.PlanetID GROUP BY T2.Planet HAVING sum(T1.Weight)  >  30;