What is the difference between covering and overlapping constraints use in DBMS?

Difference between disjoint and overlapping design constraints?

  • Answer:

    In a disjointness design constraint, an entity can belong to not more than one lower-level entity set. In overlapping generalizations, the same entity may belong to more than one lower-level entity sets. For example, in the employee-workteam example of the book, a manager may participate in more than one work-team.

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