Mapping

Relational Database Design by ER-to-Relational Mapping ,[object Object],[object Object]

ER-relational mapping algorithm ,[object Object],[object Object],[object Object],[object Object],[object Object]

Company schema ER diagram for the COMPANY schema

Example of step 1 ,[object Object],[object Object],[object Object]

Step 2: Create relations and attributes for weak entity types ,[object Object],[object Object],[object Object]

Step 3: 1:1 relationship type ,[object Object],[object Object],[object Object],[object Object],[object Object]

Step 4: 1:N relationship type ,[object Object],[object Object],[object Object]

Example of step 4 ,[object Object],[object Object],[object Object],[object Object]

Step 5: M:N relationship type ,[object Object],[object Object],[object Object],[object Object]

Step 6: Multivalued attributes ,[object Object],[object Object],[object Object]

Step 7: N-ary relationship type ,[object Object],[object Object],[object Object],[object Object]

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