08 Jun This assignment covers the following topics
Question
This assignment covers the following topics:
1) The relational model
2) Relational algebra
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Problem 1 (10pts): Keys
Consider an entity set Spaceship, with attributes name, sequence number (seq_num),
country, flight date, and captain. Assume that the following conditions hold: (1) No two
space ships have the same name and sequence number (seq_num), (2) no two space ships
have the same combination of captain and flight date, (3) each space ship has a name, a
seq_num, and a country, and (4) not all space ships have been flown or have a captain.
(a) List all candidate keys and allsuperkeys for this entity set.
(b) Write a create table statement that defines a relation appropriate for this entity set.
ALSO please explain on how you got the answer and why it is the way it is because I’m having trouble understanding this problem with so many parameters.
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