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  • January 29, 2008 at 2:25 pm

    #181419

    Hello everyone,

    I have two tables, a product table and a product history table. I want the product history table to be updated with a new when a record when the product table is updated.

    Sounds like I need a trigger. However I'm not sure how I would go about grabbing the last field updated. Note, there are no timestamps in the product table. The Product history table contains this with a relationship on product id. So for example:

    1) I change the ProductName field from "TestA" to "TestB" (in Product Table)

    2) Trigger fires (Product Table)

    3) I want the field ProductName to be captured along with the initial value (TestA) and the new value (TestB) (I'll probably use 3 variables)

    4) My insert into will insert a new record in the update history table with the following info: (modifieddate, fieldname (this is field that was updated), initial value, new value, user updated, product id)

    The T-SQL for the inserts and update i got down, but what i'm trying to figure out if there is a way I can grab the record that just got updated along with the initial value, new value, and field name. Please note, that I don't want to add a modified date in the product table field to avoid the redundancy (its in the product history table) This is the method I'll end up using if I don't figure out how to do it the way I want to though.

    Hope I'm making sense.

    Thanks

    Strick

  • January 29, 2008 at 2:46 pm

    #773058

    For this you need two tiggers on that will add new products to the history table (after insert) and another to insert a new record when a product is updated. You can access the "old" data by using the deleted table. When an update occurs the new data is available via the inserted table and the data before update is available in the deleted table.

    This link has a basic article on setting up triggers:

    http://www.4guysfromrolla.com/webtech/091901-1.shtml


    My blog: http://jahaines.blogspot.com

  • January 29, 2008 at 2:51 pm

    #773060

    As a side note, you can join the inserted and deleted tables on your key to get all the values need in a single query.


    My blog: http://jahaines.blogspot.com

  • January 31, 2008 at 7:37 am

    #773740

    Thanks guys,

    I'm going to test it out!

    Strick

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