7.22

Give a lossless, dependency-preserving decomposition into 3NF of schema $R$ of Exercise 7.1.

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Use the algorithm given in Figure 7.12.

Also don’t forget that $F=F_c$ (see exercise 7.7)

$$\begin{gathered} R_1=\{A,B,C\} \\ {R}_2=\{C,D,E\} \\ {R}_3=\{B,D\} \\ {R}_4=\{E,A\} \end{gathered}$$