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Home -> Community -> Usenet -> c.d.o.server -> Database Design Pattern Question (help!)
So this is my problem. I originally designed the following table:
(The real table is significantly longer. I shortened the table for
this discussion)
TABLE
example data:
TABLE
TableId 1 Ticker IBM Quantity 100 Currency USD Price 84 MarketValue 8400 Exchange NYS MarketCapitalization 157809800000 Beta 1.19
It works fine except my boss keeps asking me to add more and more columns to the table such as PresentValue, ValueAtRisk... When he wants another column I go in and add another column to TABLE. These requests will go on indefinitely, (ie. I will be adding more and more columns until I leave the company) So my thought is to change the structure to the following:
TABLE
TABLE_DETAIL
*TableId <---------------- Foreign Key Key <---------------- Indexed Value <---------------- Will be a Varchar(100)
example data:
TABLE
TableId 1 Ticker IBM Quantity 100 Currency USD Price 84 MarketValue 8400
TABLE_DETAIL
TableDetailId 1 2 3 *TableId 1 1 1 Key Exchange MarketCapitalization Beta Value NYS 157809800000 1.19
This way I can add as many properties as I want to TABLE_DETAIL.
Is this a standard design pattern? Is my performance going to kill me when I try to do queries. (I will probably have approximatly 2 million rows in TABLE and about 100 million rows in TABLE_DETAIL. What am I missing?
If someone has any urls or docs that is somewhat related to this problem please let me know. Received on Fri Oct 03 2003 - 15:31:35 CDT
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