Home/ Questions/Q 6592887
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-25T17:36:45+00:00

I have design problem, which I would love to get a hand with. I

  • 0

I have design problem, which I would love to get a hand with. I normally don’t have problems with designing databases, but this one gives me some trouble. 🙂
I’m making a program which is basically a task-manager, where you can create Activities and Events. An Activity may or may not have an Event associated with it, and an Event will have one to many associations.
How do I design the Event database? Since every Event can have more than one association, will I need to make a table for each Event? Where the tablename is it’s unique name? I’m completely blank.
Thanks

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    Since every Event can have more than one association, will I need to make a table for each Event?

    No. You need some version of:

    Activity
--------
ActivityID
ActivityDescription

Event
-----
EventID
EventDescription

EventActivity
-------------
EventID
ActivityID

    Then, to list an Event with all its Activities:

    SELECT * from Event
LEFT OUTER JOIN EventActivity ON Event.EventID = EventActivity.EventID
LEFT OUTER JOIN JOIN Activity ON Activity.ActivityID = EventActivity.ActivityID

    You need the LEFT OUTER JOIN instead of the usual INNER JOIN in case there are no Activities for the event.

    • 0