11. |
Which of the following key is an attribute in relation of a database that serves as the primary key of another relation in the same database?
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Answer:
Option (b) |
12. |
A primary key that consists of more than one field is called a _____________
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Answer:
Option (a) |
13. |
A foreign key must ________
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Answer:
Option (d) |
14. |
Cartesian product in relational algebra is __________
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Answer:
Option (b) |
15. |
Relational Algebra is _____________
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Answer:
Option (c) |
16. |
Key to represent relationship between tables is called __________________
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Answer:
Option (c) |
17. |
_______ produces the relation that has attributes of R1 and R2
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Answer:
Option (a) |
18. |
Which of the following operation is used if we are interested in only certain columns of a table?
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Answer:
Option (a) |
19. |
Which of the following operations need the participating relations to be union compatible?
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Answer:
Option (d) |
20. |
The result of the UNION operation between R1 and R2 is a relation that includes
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Answer:
Option (d) |