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  1. #1
    Join Date
    Jun 2014
    Posts
    9

    Supertype / Subtype structure

    Within a supertype/subtypes E-R Structure can subtypes have a 'one to many' relationship between them?

  2. #2
    Join Date
    Feb 2004
    Location
    In front of the computer
    Posts
    15,579
    As super/sub-types the super-type has a super to sub relationship. There are special cases where a single super-type can or must have more than one sub-type. These are unusual, but they certainly do exist.

    -PatP
    In theory, theory and practice are identical. In practice, theory and practice are unrelated.

  3. #3
    Join Date
    Jun 2014
    Posts
    9

    Thanks

    Thanks Pat!

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