Re: Many columns (as FK) vs 3x more Columns (in the same table)

On 9/19/2012 3:12 PM, Jim Giner wrote:

On 9/18/2012 8:52 AM, Bruno Sandivilli wrote:

Hi, i strugling to decide what is the best choice: I have a 15 row x 3 columns Flash DataGrid, it means, for each row i have 3 values. To represent this in my Database, I could:

    1. Create 2 Tables : A Values table - with 3 columns ; and a Bill

table

    (with 15 foreign keys, each one pointing to one row in the Values

table).

    2. Create one Table with 45 columns (15 fields * 3 values for each
    field).

I want to know, wich is the best choice? To manage my query, now i have a SELECT with a thousand of leftJoins. This is the best choice? How could I run a query wich will give all results linked, like: ( column_1_val_1, column_1_val_2, column_1_val_2, column_2_val_1, column_1_val_2, column_1_val_3, etc...) ? Thanks!

I don't get it either. You have 15 rows with 3 cols each. So? Display them. Query them. Big deal. What is the real difficulty here? I'm not seeing it. (I don't read it as 15x3x3 - at least that's not what he said since he said 'for each row he has 3 values') Continuing on - why is your visual structure at this point NOT the same as your physical structure? I don't think you're telling us what your real problem is here. We need more information. You have '15 row with 3 cols each', ie, 'each row has 3 values'. So - your table has 15 records in it, each with 3 columns. Add a key field to give each row an identity and that's it. No?

Sorry - but again - this post is not showing me a clear problem.