Do all viruses incorporate themselves into the host cell's genome?

Question

Hello,

Do all viruses incorporate themselves into the host cell's genome? Or is it just retroviruses? Can any DNA viruses do this? Also, must a virus be capable of incorporating themselves into the host cell genome in order to be oncogenic? Or are other oncogenic mechanisms possible?

Please help

I didn't find the right solution from the internet.

References:

http://www.askabiologist.org.uk/answers/viewtopic.php?id=6944

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Thank you