When to choose oracle

Hi
I don’t know whether I can start this thread in this forum, but nevertheless I think I can get a better clarity from the experts, when I was googling to know the advantages of oracle over teradata and vice versa, I happened to see some articles, but most of them were written by peoples Who are biased with their own technology, I couldn’t get a fair idea , so it would be helpful for me if anyone could share their experience who had seen both the positives and negatives of both these database .
My questions are.
1.when to choose oracle and when to choose teradata
2.What are the major architectural differences between oracle and teradata, that makes one better than the other

You might find this article interesting,
Teradata and Oracle Partner for Enterprise Analytics
http://www.dashboardinsight.com/news/teradata-and-oracle-partner-for-enterprise-analytics.aspx
Well since you have read both sides of the story you can make your own judgement based on the articles. I suppose these articles from both sides will lists the pros/cons compare to their competitor and vice versa. You can gather these pros/cons and compose your own list and make smart decision.
Not knowing much about the technology of Teradata, my comments here is again biased. As the name suggested, TeraData has some strength on DataWare house territory, on most other parts I believe Oracle has an edge. Don't forget Oracle has survived fiercy competition from Sybase and Informix and dominate the market for over a decade.

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