Consider the universal relation R = \{A, B, C, D, E, F, G, H, I\} and

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Module 2: Relational Query Languages & Design

201814m

Consider the universal relation $R = \{A, B, C, D, E, F, G, H, I\}$ and the set of functional dependencies
$F = \{\{A, B\} \rightarrow \{C\}, \{A\} \rightarrow \{D, E\}, \{B\} \rightarrow \{F\}, \{F\} \rightarrow \{G, H\}, \{D\} \rightarrow \{I, J\}\}$
What is the key for $R$ ? Decompose $R$ into 2NF, then 3NF relations.

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