1. Translating from ER to Relationship Schema Adapted from Juliana Freire

2. The easy part Entity  relation with attributes underlined field is key Relationship -> relation? special situations – Multi-valued and composite attributes – Weak entity sets – ISA relationships – Relations that result from an entity set and 1tomany relationship

6. Translating Many-to-Many

8. One to Many

9. One to Many answer

10. One – to- Many

11. One to Many with total participation

12. Why not a new relation?

13. Mapping many to many attribute

14. Throw the attributes onto the relationship table

15. 1-to-many relationship with an attribute?

16. Add it to the 1 side

17. Translating Weak Entity Sets

18. Translating ISA relationship – as a tier

19. Translating ISA – one with all

20. Which one?

21. Participation Constraints

22. Splitting tables is always an option

23. Sample ERD

24. Equivalent Relational Schema

25. Translate This

26. Translation steps