| select client.name | |
| from client join Package | |
| on client.AccountNumber = Package.Recipient | |
| where package.Weight = 1.5; | |
| select sum(weight) from Package | |
| where Sender = ( | |
| select Recipient from Package where Weight = 1.5 | |
| ); | |
| SELECT SUM(p.weight) | |
| FROM Client AS c | |
| JOIN Package as P | |
| ON c.AccountNumber = p.Sender | |
| WHERE c.Name = "Al Gore's Head"; |