Pros and cons of creating a table with key

Hi Folks
I have some tables where there is no key defined in the source system. What is the best way to build such tables. In my case the source system is Teradata.
I have 25-30 columns in dimension and what is the best way to load this data where there is no.
What will be the Pros and Cons if I have a table without a key or if I create a table with 25-30 keys.
regards
Poonam

I recently purchased a Mac Mini and am using it with my TV. Here's what I found:
Using the HDMI connection on the Mac Mini, the image on the TV is very harsh. It's very bright, high contrast and garish colors. I did a lot of testing and am convinced this is due to the HDMI Display Profile in OS X Yosemite. I could not find any way to change the display profile in the Mac Mini as long as HDMI was the connection.
Using the miniDisplayport/Thunderbolt connection on the Mac Mini, with the Apple miniDisplayPort-DVI adapter and a DVI-HDMI cable the picture is perfect. (Note, however, that this connection only carries video; if you want audio you will have to use a separate cable to connect the Mac Mini audio line out port to your TV's audio line in port.)
That said, the larger the TV the less quality you will have displaying text. I suggest using a 21" or smaller TV as a monitor if you will be doing text work.
My setup is with a 40" Sony Bravia 1080p HDTV and the primary use is for video (concerts, movies, Skype, etc), not office apps. As I said earlier, the picture is perfect - brightness, contrast, colors, resolution are as nice as I could ask for.

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Can someone please share what is the pros and Cons of trusting AD domain for more than 10 different
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The main/parent company has acquired smaller business chain of 15+ offices in which they have
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Edited by: 895044 on Dec 5, 2011 2:55 AM

895044 wrote:
how to create a table with datatype blob and insert a pdf file,
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{message:id=9360002}
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Pros and cons of creating a table with key

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