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  1. #1
    Join Date
    Oct 2005

    DB ERM Notation and Relationship Quick Check

    Hi all,

    Before I complete the rest of my ERM can someone quickly check Im on the right path with the relationship and notation found at:

    If im right it should read as follows:

    - A Coach driver will only be in the COACH_DRIVER table once and MAY have an entry in COACH_BOOKING zero or many times
    - Zero or Many COACH_BOOKING must have a COACH_DRIVER

    Thanks in advance !

    P.S. The software Im using doesnt allow for dotted lines hence the use of circle notation on Coach Driver


  2. #2
    Join Date
    Dec 2003
    Download a copy of DBDesigner (free) and give it another shot.

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