Results 1 to 2 of 2
  1. #1
    Join Date
    Jan 2013
    Posts
    1

    Conceptual Data Modelling

    I've been tasked with creating a driving school database.

    Just wondering is a database model based on one moment in time or over a period of time?

    For example, I have a relationship between Car and Instructor. Basically an Instructor is allocated a car by a driving school.

    If it was a moment in time...
    Car (1..1) ------ (0..1) Instructor

    If it was over a period of time...
    Car (1..*) ------ (0..*) Instructor

  2. #2
    Join Date
    Feb 2004
    Location
    In front of the computer
    Posts
    15,579
    Most database products can do both, depending on how you configure them.

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

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •