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  1. #1
    Join Date
    Oct 2003

    Unanswered: Updating Values in a table with Foreign Key Violations

    I have a "current" table which users update on a daily basis, it holds forecast data. This table is designed to only hold 7 days of data and is therfore always rolling over by date.
    What I want to do is have a procedure that copies this "Current" table to a "History" table every day so the historical information is stored. The copy is simple, but how do I check for and over ride values that are already in the "history" table with the newest values from the "current" table because the "current" values have the possibility of changing a few times while the forecast is updated. I can define a primary key but am not sure how to check for and update the necessary values?

    Any help??

    Many thanks!

  2. #2
    Join Date
    Nov 2002
    Post the DDL of the tables...

    I imagine a trigger (for updates) and a nightly process (for rolling over) is what you might want...

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