Trong lớp nền kinh tế, hành khách được một túi bên trong khoang máy bay và hai túi đăng ký - tổng trọng lượng 50 kg tối đa. Ông Smith đã đăng ký một túi, mang thẻ AQ636-84763. Các yếu tố dữ liệu thu được từ câu trên là:Chúng tôi đã phát hiện ra rằng "lớp học" là một từ đồng nghĩa cho "phần" | Simpo PDF Merge and Split Unregistered Version - http Chapter 6 from reservation inner join passenger on inner join flight on inner join airline on where 34 order by Currently this flight is not very popular and it looks like Peter and Annie will be able to chat together All Persons on a Flight In the unlikely event of a plane crash we might need to extract quickly the list of all persons on a flight. The following query does just that select as last name as first name passenger as type from reservation inner join passenger on inner join flight on inner join airline on where 34 union select as last name as first name crew as type from flight_crew inner join crew on inner join flight on inner join airline on 89 Simpo PDF Merge and Split Unregistered Version - http Supplemental Case Study where 34 order by last name first name The results are sorted by last name and first name note the type column that indicates whether this person is a passenger or a crew member. Summary From the study of a few documents about an airline system we listed the possible data elements that become columns grouped into tables. We carefully chose the primary key or keys for each table and built relations between these tables verifying that all potential data elements were included in at least one table. 90 Simpo PDF Merge and Split Unregistered Version - http Index A airline system
