Converting a Many-To-Many Unary Relationship into a Relational Database from an E-R

question 49

Multiple Choice

Converting a many-to-many unary relationship into a relational database from an E-R diagram ____.

• A) can be done by adding another copy of the unique identifier of the single entity's table into the same table with a different attribute name
• B) can be done by splitting the attributes of the single entity into two tables, each with its own copy of the unique identifier
• C) requires the creation of an additional table beyond the one that represents the single entity in the relationship
• D) a & b above
• E) a & c above

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