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Figure 5.1 Fragment of the E-R diagram for the entity type Person.

Figure 5.1 Fragment of the E-R diagram for the entity type Person. Figure 5.2 Translation of entity type Person into a relation. Figure 5.3 E-R diagrams for several relationship types. Figure 5.4A Translations of some relationships. (continued on next slide).

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Figure 5.1 Fragment of the E-R diagram for the entity type Person.

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  1. Figure 5.1Fragment of the E-R diagram for the entity type Person.

  2. Figure 5.2Translation of entity type Person into a relation.

  3. Figure 5.3E-R diagrams for several relationship types.

  4. Figure 5.4ATranslations of some relationships. (continued on next slide)

  5. Figure 5.4B (continued)Translations of some relationships.

  6. Figure 5.5Example of an Is A hierarchy.

  7. Figure 5.6Using Is A for data fragmentation.

  8. Figure 5.7Participation constraints.

  9. Figure 5.8The Is A hierarchy of the PSSC enterprise..

  10. Figure 5.9Client/broker Information: first attempt.

  11. Figure 5.10Client/broker Information: second try.

  12. Figure 5.11Trading information in the PSSC enterprise.

  13. Figure 5.12An alternative representation of the transcript information.

  14. Figure 5.13Replacing the ternary relationship Sold of Figure 5.3 with three binary relationships.

  15. Figure 5.14An E-R diagram for the Student Registration System.

  16. Figure 5.15AA schema for the Student Registration System—Part 1. (continued on next slide)

  17. Figure 5.15B (continued)A schema for the Student Registration System—Part 1. (continued on next slide)

  18. Figure 5.15C (continued)A schema for the Student Registration System—Part 1.

  19. Figure 5.16AA schema for the Student Registration System—Part 2. (continued on next slide)

  20. Figure 5.16B (continued)A schema for the Student Registration System—Part 2. (continued on next slide)

  21. Figure 5.16C (continued)A schema for the Student Registration System—Part 3. (continued on next slide)

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