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Explain the representation of a many-to-many strong entity relationship in a relational database design.
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Database Processing: Fundamentals, Design, and Implementation
Edition: 15th
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Database Processing: Fundamentals, Design, and Implementation
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Many-to-many relationships cannot be directly represented in a relational database design. Therefore, many-to-many relationships are essentially broken into two one-to-many relationships by creating an intersection table that represents the relationship itself. The intersection table takes its key as a combination of the keys of the two original, or parent, entities. Each of the parent entities has a one-to-many relationship with the intersection table that is represented by placing the keys of the parents into the intersection table.
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