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ER-Diagram *connection* notations question [Closed]

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  • #237488 Reply

    sergen
    Member

    From Help of MyEclipse 4.0M3 ER-Designer Quickstart:

    Relationships
    A relationship is depicted as a directed, labeled connection between 2 database table entities. The connection’s label is based on the pattern: parentTable(column1,…)= childTable(column1,…) mapping. Next to the relationship label is a direction arrow that points from the parent table to the child table (->). When you fly-over a connection, the foreign key constraint name is displayed. For example the JHIST_JOB_FK constraint is depicted in Figure 6 just below the relation in bright blue text.

    BUT no word about hieroglyphs that appeared to be at the *end* of connections:
    1) the one is like a crossed-out trident
    2) the other is like a trident with a small circle

    Please, complete the Help.

    #237519 Reply

    Brian Fernandes
    Moderator

    Sergen,

    We apologize for the oversight, thank you for bringing that to our attention.

    for now
    1) crossed-out trident = one or more
    2) trident with small circle = zero or more
    3) vertical line with small circle = zero or one
    4) two vertical lines = one and only one

    Best,
    Brian.

    #237621 Reply

    sergen
    Member

    This message has not been recovered.

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