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Given the following set of functional dependencies {cf→bg, g→d, cdg→f, b→de, d→c} defined on R(b,c,d,e,f,g)
a. Is cf→e implied by the FDs?
b. Is dg a superkey?
c. Is dg a candidate key?
d. Find a non-redundant cover.
e. Find a canonical cover.
f. What are the candidate keys?
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What is called an evaluation primitive? A relational algebra operation annotated with instructions on how to evaluate is known as an evaluation primitive.
Table_Name( attribute_1, attribute_2, attribute_3, ….. ,attribute_x) Primary Key ( attribute_1, attribute_2) Foreign Key attribute_4 References Table_Name_2 (repeat for each fore
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what is RDBMS? how it works? good example.
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