Database Functional Dependencie and Normalization Rules Prove or disprove the following inference rules for functional/multi-valued dependencies. 1.

  Database Functional Dependencie and Normalization Rules

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Prove or disprove the following inference rules for functional/multi-valued dependencies. 1. X→→ Y and Z Y and WSZEX→ W 2. X→Y, Z→Y+X→ Z 3. X→Y, XY → Z=X→ Z 4. X→→→→Y EX→Y 5. X→Y, Z→ WXZYW Prove or disprove the following inference rules for functional/multi-valued dependencies. 1. X→→ Y and Z Y and WSZEX→ W 2. X→Y, Z→Y+X→ Z 3. X→Y, XY → Z=X→ Z 4. X→→→→Y EX→Y 5. X→Y, Z→ WXZYW

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1 Prove or disprove the following inference rule X Y and Z Y and W Z X W This inference rule is valid It can be proven using the following steps By definition of functional dependency we know that X Y ... View the full answer