How about the mandatory or optional in this ER question A painter can paint many painting but
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How about the mandatory or optional in this ER question
A painter can paint many painting but each painting is only painted by one painter. A gallery can have many paintings but each painting is exhibited by a gallery
I know the cardinality but what about the optional and mandatory choices
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Database Systems Design Implementation and Management
ISBN: 978-1285196145
11th edition
Authors: Carlos Coronel, Steven Morris
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