Library Database (cont’d)

• Step 5. Assign an identifier for each entity

  • AuthorID, ISBN, PublisherID

• Step 6. Draw completed E-R diagram

AUTHOR

BOOK

AuthorID, ...

ISBN, ...

PublisherID, ...

N

1

N

M

(0,N)

(0,N)

(1,1)

(0,N)

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