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Summary of Transformation Rules

Learn how to translate an E-R schema into a relational schema, defining keys and null value possibilities for each attribute. Practice database design exercises.

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Summary of Transformation Rules

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  1. Summary of Transformation Rules Database Design

  2. ...More Rules... Database Design

  3. …Even More Rules... Database Design

  4. …and the Last One... Database Design

  5. Exercise • Translate the following E-R schema into a relational schema. For each relation indicate the key and, for each attribute, specify if null values can occur (supposing that the attributes of the E-R schema do not admit null values) Database Design

  6. E-R schema A11 A12 A13 AR4 A31 E1 (0,1) (0,N) E3 R4 (0,N) (1,1) (0,N) (0,N) R5 R3 R1 A41 (1,1) (1,1) A21 (0,N) (1,1) E2 R2 E4 A22 Database Design

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