Draw an ER diagram for multiple copies of the same book with unique book code. Please answer this question

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Draw an ER diagram for multiple copies of the same book with unique book .

What I have tried:

can i try this with weak entity? as i take book as strong entity and copy as weak entity and i have no idea what can i give attribute of weak entity. the attribute of book is ISBN no.(primary key),price,edition,year,title,pages.and next what can i do?

Posted 12-Sep-20 4:56am

Member 14936556

Updated 12-Sep-20 6:07am

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Gerry Schmitz · Answer 1 · 2020-09-12T06:08:00

Solution 1

The parent is the ISBN / Title; the children are the physical books for that ISBN.

The parent says nothing about condition, price, location / owner; the children do.

The parent may contain (original) author, first pub date, ... attributes not specific for a particular copy.

Posted 12-Sep-20 6:08am

Gerry Schmitz